removed:duplicate line

* https://github.com/jambonz/jambonz-feature-server/issues/807

* feat/807: Using minConfidence from recognizer settings

* feat/807: new reason stt-min-confidence-error

* feat/807: sending stt-min-confidence instead of  stt-min-confidence-error

* feat/807: sending stt-low-confidence instead of  stt-min-confidence-error

* feat/807 - removed ? for this.data

.github/workflows/build.yml

@@ -6,10 +6,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
       - run: npm ci
       - run: npm run jslint
       - run: docker pull drachtio/sipp

.gitignore

@@ -42,3 +42,4 @@ ecosystem.config.js
 test/credentials/*.json
 run-tests.sh
 run-coverage.sh
+.vscode

.vscode/launch.json

@@ -1,17 +0,0 @@
-{
-  // Use IntelliSense to learn about possible attributes.
-  // Hover to view descriptions of existing attributes.
-  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-  "version": "0.2.0",
-  "configurations": [
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "Launch Program",
-      "program": "${workspaceFolder}/test/index.js",
-      "env": {
-        "NODE_ENV": "test"
-      }
-    }
-  ]
-}

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 Drachtio Communications Services, LLC
+Copyright (c) 2018-2024 FirstFive8, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

app.js

@@ -109,7 +109,7 @@ const disconnect = () => {
     httpServer?.on('close', resolve);
     httpServer?.close();
     srf.disconnect();
-    srf.locals.mediaservers.forEach((ms) => ms.disconnect());
+    srf.locals.mediaservers?.forEach((ms) => ms.disconnect());
   });
 };
 

data/example-voicemail-greetings.json

@@ -9,7 +9,112 @@
     "can't take your call",
     "will get back to you",
     "I'll get back to you",
-    "we are unable"
+    "we are unable",
+    "Unable to take your call now",
+    "I'll reply soon",
+    "I'll call back",
+    "I'll reach out to you as soon as possible",
+    "Leave a message",
+    "Away from phone",
+    "Not available now",
+    "I'll return call",
+    "On another call",
+    "Currently on another call",
+    "I will return call later",
+    "Busy please leave message",
+    "Message will be returned promptly",
+    "Currently unavailable to answer",
+    "Planning to return your call soon",
+    "Apologies for missing your call",
+    "Not by the phone at the moment",
+    "Expecting to return your call",
+    "Currently not accessible",
+    "Intend to call back",
+    "Appreciate your patience!",
+    "Engaged in another conversation",
+    "I Will respond promptly",
+    "Kindly leave a message",
+    "Currently occupied leave a message",
+    "Unfortunately unable to answer right now",
+    "Occupied at the moment",
+    "Not present leave a message",
+    "Regrettably unavailable kindly leave a message",
+    "Will ensure a prompt response to your message",
+    "Currently engaged",
+    "Will return your call at the earliest opportunity",
+    "Your message will receive my prompt attention",
+    "I'll respond as soon as I can",
+    "Your message is important please leave it after the beep",
+    "Away from the phone at the moment",
+    "Unable to answer right now",
+    "Engaged in another task",
+    "Not by the phone presently",
+    "I'll respond at my earliest convenience",
+    "Away from the phone momentarily",
+    "I'll return your call shortly",
+    "Currently not able to answer",
+    "Your message is important please leave it after the tone",
+    "I'm unable to take your call right now",
+    "Please leave your message for me",
+    "I'll get back to you soon",
+    "Your call has been missed",
+    "Please leave a detailed message for me to respond to",
+    "Leave a message I'll make sure to respond",
+    "Feel free to leave a message",
+    "Your call is important to me",
+    "I'll get back to you shortly",
+    "Your message will be attended to promptly",
+    "Not available at the moment",
+    "I'll be sure to get back to you",
+    "I'll call you back soon",
+    "I'll ensure a prompt response",
+    "Sorry for the inconvenience",
+    "I'll return your call",
+    "I'll make sure to get back to you",
+    "I'll call you back shortly",
+    "I'll return your call as soon as possible",
+    "Apologies for the inconvenience leave your message",
+    "Your call is appreciated",
+    "I'm unavailable to answer",
+    "I'm currently away",
+    "I'll return your call as soon as I can",
+    "I'm away from the phone",
+    "I'm currently unavailable to take your call",
+    "Sorry for missing your call",
+    "I'll ensure it receives my immediate attention",
+    "I'm away from the phone momentarily",
+    "I'll reach out to you shortly",
+    "Apologies for the inconvenience",
+    "Currently occupied",
+    "Unable to answer your call at the moment",
+    "I'll make sure to follow up with you",
+    "Sorry for not being available",
+    "I'll reach out to you as soon as I can",
+    "I'm currently engaged",
+    "I'm currently busy",
+    "I'm currently unavailable",
+    "I'll respond to you at my earliest convenience",
+    "Your message is appreciated",
+    "I'll get back to you promptly",
+    "I'll get back to you without delay",
+    "Currently away from the phone",
+    "I'll return your call at my earliest opportunity",
+    "Sorry for the missed call",
+    "I'll make sure to address your concerns",
+    "Please provide your details for a callback",
+    "I'll make every effort to respond promptly",
+    "I'll ensure it's attended to promptly",
+    "Away from the phone temporarily",
+    "I'll get back to you as soon as I return",
+    "Currently not in a position to answer your call",
+    "Your call cannot be answered at the moment",
+    "I'll ensure to respond as soon as I'm able",
+    "Your call is important please leave a message",
+    "Unable to answer right now please leave your message",
+    "Currently not accessible intending to return your call",
+    "I'll respond promptly to your message",
+    "leave a memo",
+    "please leave a memo"
   ],
   "es-ES": [
     "le pasamos la llamada",

lib/config.js

@@ -120,6 +120,7 @@ const HTTP_TIMEOUT = 10000;
 const HTTP_PROXY_IP = process.env.JAMBONES_HTTP_PROXY_IP;
 const HTTP_PROXY_PORT = process.env.JAMBONES_HTTP_PROXY_PORT;
 const HTTP_PROXY_PROTOCOL = process.env.JAMBONES_HTTP_PROXY_PROTOCOL || 'http';
+const HTTP_USER_AGENT_HEADER = process.env.JAMBONES_HTTP_USER_AGENT_HEADER || 'jambonz';
 
 const OPTIONS_PING_INTERVAL = parseInt(process.env.OPTIONS_PING_INTERVAL, 10) || 30000;
 
@@ -129,6 +130,10 @@ const JAMBONZ_RECORD_WS_PASSWORD = process.env.JAMBONZ_RECORD_WS_PASSWORD || pro
 const JAMBONZ_DISABLE_DIAL_PAI_HEADER = process.env.JAMBONZ_DISABLE_DIAL_PAI_HEADER || false;
 const JAMBONES_DISABLE_DIRECT_P2P_CALL = process.env.JAMBONES_DISABLE_DIRECT_P2P_CALL || false;
 
+const JAMBONES_EAGERLY_PRE_CACHE_AUDIO = parseInt(process.env.JAMBONES_EAGERLY_PRE_CACHE_AUDIO, 10) || 0;
+
+const JAMBONES_USE_FREESWITCH_TIMER_FD = process.env.JAMBONES_USE_FREESWITCH_TIMER_FD;
+
 module.exports = {
   JAMBONES_MYSQL_HOST,
   JAMBONES_MYSQL_USER,
@@ -151,6 +156,7 @@ module.exports = {
   JAMBONES_API_BASE_URL,
   JAMBONES_TIME_SERIES_HOST,
   JAMBONES_INJECT_CONTENT,
+  JAMBONES_EAGERLY_PRE_CACHE_AUDIO,
   JAMBONES_ESL_LISTEN_ADDRESS,
   JAMBONES_SBCS,
   JAMBONES_OTEL_ENABLED,
@@ -193,6 +199,7 @@ module.exports = {
   HTTP_PROXY_IP,
   HTTP_PROXY_PORT,
   HTTP_PROXY_PROTOCOL,
+  HTTP_USER_AGENT_HEADER,
   OPTIONS_PING_INTERVAL,
   RESPONSE_TIMEOUT_MS,
   JAMBONES_WS_HANDSHAKE_TIMEOUT_MS,
@@ -208,5 +215,6 @@ module.exports = {
   JAMBONZ_RECORD_WS_USERNAME,
   JAMBONZ_RECORD_WS_PASSWORD,
   JAMBONZ_DISABLE_DIAL_PAI_HEADER,
-  JAMBONES_DISABLE_DIRECT_P2P_CALL
+  JAMBONES_DISABLE_DIRECT_P2P_CALL,
+  JAMBONES_USE_FREESWITCH_TIMER_FD
 };

lib/dynamic-apps.js

@@ -30,6 +30,20 @@ const appsMap = {
         }
       ]
     }]
+  },
+  conference: {
+    // Dummy hook to follow later feature server logic.
+    call_hook: {
+      url: 'https://jambonz.org',
+      method: 'GET'
+    },
+    account_sid: '',
+    app_json: [{
+      verb: 'conference',
+      name: '',
+      beep: false,
+      startConferenceOnEnter: true
+    }]
   }
 };
 
@@ -38,6 +52,7 @@ const createJambonzApp = (type, {account_sid, name, caller_id}) => {
   app.account_sid = account_sid;
   switch (type) {
     case 'queue':
+    case 'conference':
       app.app_json[0].name = name;
       break;
     case 'user':

lib/middleware.js

@@ -75,13 +75,19 @@ module.exports = function(srf, logger) {
       req.locals.application_sid = application_sid;
     }
     // check for call to queue
-    if (uri.user?.startsWith('queue-') && req.locals.originatingUser && clientDb?.allow_direct_queue_calling) {
+    else if (uri.user?.startsWith('queue-') && req.locals.originatingUser && clientDb?.allow_direct_queue_calling) {
       const queue_name = uri.user.match(/queue-(.*)/)[1];
       logger.debug(`got Queue from Request URI header: ${queue_name}`);
       req.locals.queue_name = queue_name;
     }
+    // check for call to conference
+    else if (uri.user?.startsWith('conference-') && req.locals.originatingUser && clientDb?.allow_direct_app_calling) {
+      const conference_id = uri.user.match(/conference-(.*)/)[1];
+      logger.debug(`got Conference from Request URI header: ${conference_id}`);
+      req.locals.conference_id = conference_id;
+    }
     // check for call to registered user
-    if (!JAMBONES_DISABLE_DIRECT_P2P_CALL && req.locals.originatingUser && clientDb?.allow_direct_user_calling) {
+    else if (!JAMBONES_DISABLE_DIRECT_P2P_CALL && req.locals.originatingUser && clientDb?.allow_direct_user_calling) {
       const arr = /^(.*)@(.*)/.exec(req.locals.originatingUser);
       if (arr) {
         const sipRealm = arr[2];
@@ -97,7 +103,7 @@ module.exports = function(srf, logger) {
     if (req.has('X-MS-Teams-Tenant-FQDN')) req.locals.msTeamsTenant = req.get('X-MS-Teams-Tenant-FQDN');
     if (req.has('X-Cisco-Recording-Participant')) {
       const ciscoParticipants = req.get('X-Cisco-Recording-Participant');
-      const regex = /sip:[\d]+@[\d]+\.[\d]+\.[\d]+\.[\d]+/g;
+      const regex = /sip:[a-zA-Z0-9]+@[a-zA-Z0-9.-_]+/g;
       const sipURIs = ciscoParticipants.match(regex);
       logger.info(`X-Cisco-Recording-Participant : ${sipURIs} `);
       if (sipURIs && sipURIs.length > 0) {
@@ -237,6 +243,9 @@ module.exports = function(srf, logger) {
         logger.debug(`calling to registered user ${req.locals.called_user}, generating dial app`);
         app = createJambonzApp('user',
           {account_sid, name: req.locals.called_user, caller_id: req.locals.callingNumber});
+      } else if (req.locals.conference_id) {
+        logger.debug(`calling to conference ${req.locals.conference_id}, generating conference app`);
+        app = createJambonzApp('conference', {account_sid, name: req.locals.conference_id});
       } else if (req.locals.application_sid) {
         app = await lookupAppBySid(req.locals.application_sid);
       } else if (req.locals.originatingUser) {
@@ -343,6 +352,15 @@ module.exports = function(srf, logger) {
         direction: CallDirection.Inbound,
         traceId: rootSpan.traceId
       });
+      // if transferred call contains callInfo, let update original data to newly created callInfo in this instance.
+      if (app.transferredCall && app.callInfo) {
+        req.locals.callInfo.callerName = app.callInfo.callerName;
+        req.locals.callInfo.from = app.callInfo.from;
+        req.locals.callInfo.to = app.callInfo.to;
+        req.locals.callInfo.originatingSipIp = app.callInfo.originatingSipIp;
+        req.locals.callInfo.originatingSipTrunkName = app.callInfo.originatingSipTrunkName;
+        delete app.callInfo;
+      }
       next();
     } catch (err) {
       span.end();
@@ -382,7 +400,7 @@ module.exports = function(srf, logger) {
           },
           recognizer: {
             vendor: app.speech_recognizer_vendor,
-            ...(app.speech_synthesis_label && {label: app.speech_synthesis_label}),
+            ...(app.speech_recognizer_label && {label: app.speech_recognizer_label}),
             language: app.speech_recognizer_language,
             ...(app.fallback_speech_recognizer_vendor && {fallback_vendor: app.fallback_speech_recognizer_vendor}),
             ...(app.fallback_speech_recognizer_label && {fallback_label: app.fallback_speech_recognizer_label}),

lib/session/adulting-call-session.js

@@ -53,16 +53,24 @@ class AdultingCallSession extends CallSession {
   }
 
   _callerHungup() {
+    this._hangup('caller');
+  }
+
+  _jambonzHangup() {
+    this._hangup();
+  }
+
+  _hangup(terminatedBy = 'jambonz') {
     if (this.dlg.connectTime) {
       const duration = moment().diff(this.dlg.connectTime, 'seconds');
-      this.rootSpan.setAttributes({'call.termination': 'hangup by caller'});
-      this.callInfo.callTerminationBy = 'caller';
+      this.rootSpan.setAttributes({'call.termination': `hangup by ${terminatedBy}`});
+      this.callInfo.callTerminationBy = terminatedBy;
       this.emit('callStatusChange', {
         callStatus: CallStatus.Completed,
         duration
       });
     }
-    this.logger.info('InboundCallSession: caller hung up');
+    this.logger.info(`InboundCallSession: ${terminatedBy} hung up`);
     this._callReleased();
     this.req.removeAllListeners('cancel');
   }

lib/session/confirm-call-session.js

@@ -34,6 +34,9 @@ class ConfirmCallSession extends CallSession {
   _callerHungup() {
   }
 
+  _jambonzHangup() {
+  }
+
 
 }
 

lib/session/inbound-call-session.js

@@ -35,11 +35,21 @@ class InboundCallSession extends CallSession {
   _onCancel() {
     this.rootSpan.setAttributes({'call.termination': 'caller abandoned'});
     this.callInfo.callTerminationBy = 'caller';
+    const wasEarlyMedia = this.callInfo.callStatus === 'early-media';
     this._notifyCallStatusChange({
       callStatus: CallStatus.NoAnswer,
       sipStatus: 487,
       sipReason: 'Request Terminated'
     });
+    if (wasEarlyMedia) {
+      const duration = 0; // Set duration to 0 for early media termination, required param
+      this._notifyCallStatusChange({
+        callStatus: CallStatus.Completed,
+        sipStatus: 487,
+        sipReason: 'Call Terminated During Early Media',
+        duration: duration
+      });
+    }
     this._callReleased();
   }
 
@@ -67,15 +77,27 @@ class InboundCallSession extends CallSession {
    * This is invoked when the caller hangs up, in order to calculate the call duration.
    */
   _callerHungup() {
+    this._hangup('caller');
+  }
+
+  _jambonzHangup() {
+    this.dlg?.destroy();
+  }
+
+  _hangup(terminatedBy = 'jambonz') {
+    if (this.dlg === null) {
+      this.logger.info('InboundCallSession:_hangup - race condition, dlg cleared by app hangup');
+      return;
+    }
+    this.logger.info(`InboundCallSession: ${terminatedBy} hung up`);
     assert(this.dlg.connectTime);
     const duration = moment().diff(this.dlg.connectTime, 'seconds');
-    this.rootSpan.setAttributes({'call.termination': 'hangup by caller'});
-    this.callInfo.callTerminationBy = 'caller';
+    this.rootSpan.setAttributes({'call.termination': `hangup by ${terminatedBy}`});
+    this.callInfo.callTerminationBy = terminatedBy;
     this.emit('callStatusChange', {
       callStatus: CallStatus.Completed,
       duration
     });
-    this.logger.info('InboundCallSession: caller hung up');
     this._callReleased();
     this.req.removeAllListeners('cancel');
   }

lib/session/rest-call-session.js

@@ -1,6 +1,9 @@
 const CallSession = require('./call-session');
 const {CallStatus} = require('../utils/constants');
 const moment = require('moment');
+const {parseUri} = require('drachtio-srf');
+const { normalizeJambones } = require('@jambonz/verb-specifications');
+const makeTask = require('../tasks/make_task');
 
 /**
  * @classdesc Subclass of CallSession.  This represents a CallSession that is
@@ -42,20 +45,81 @@ class RestCallSession extends CallSession {
   setDialog(dlg) {
     this.dlg = dlg;
     dlg.on('destroy', this._callerHungup.bind(this));
+    dlg.on('refer', this._onRefer.bind(this));
     this.wrapDialog(dlg);
   }
 
+  /**
+   * global referHook
+   */
+
+  set referHook(hook) {
+    this._referHook = hook;
+  }
+
+  /**
+   * This is invoked when the called party sends REFER to Jambonz.
+   */
+  async _onRefer(req, res) {
+    if (this._referHook) {
+      try {
+        const to = parseUri(req.getParsedHeader('Refer-To').uri);
+        const by = parseUri(req.getParsedHeader('Referred-By').uri);
+        const b3 = this.b3;
+        const httpHeaders = b3 && {b3};
+        const json = await this.requestor.request('verb:hook', this._referHook, {
+          ...(this.callInfo.toJSON()),
+          refer_details: {
+            sip_refer_to: req.get('Refer-To'),
+            sip_referred_by: req.get('Referred-By'),
+            sip_user_agent: req.get('User-Agent'),
+            refer_to_user: to.scheme === 'tel' ? to.number : to.user,
+            referred_by_user: by.scheme === 'tel' ? by.number : by.user,
+            referring_call_sid: this.callSid,
+            referred_call_sid: null,
+          }
+        }, httpHeaders);
+
+        if (json && Array.isArray(json)) {
+          const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));
+          if (tasks && tasks.length > 0) {
+            this.logger.info('RestCallSession:handleRefer received REFER, get new tasks');
+            this.replaceApplication(tasks);
+            if (this.wakeupResolver) {
+              this.wakeupResolver({reason: 'RestCallSession: referHook new taks'});
+              this.wakeupResolver = null;
+            }
+          }
+        }
+        res.send(202);
+        this.logger.info('RestCallSession:handleRefer - sent 202 Accepted');
+      } catch (err) {
+        this.logger.error({err}, 'RestCallSession:handleRefer - error while asking referHook');
+        res.send(err.statusCode || 501);
+      }
+    } else {
+      res.send(501);
+    }
+  }
   /**
    * This is invoked when the called party hangs up, in order to calculate the call duration.
    */
   _callerHungup() {
+    this._hangup('caller');
+  }
+
+  _jambonzHangup() {
+    this._hangup();
+  }
+
+  _hangup(terminatedBy = 'jambonz') {
     if (this.restDialTask) {
       this.restDialTask.turnOffAmd();
     }
-    this.callInfo.callTerminationBy = 'caller';
+    this.callInfo.callTerminationBy = terminatedBy;
     const duration = moment().diff(this.dlg.connectTime, 'seconds');
     this.emit('callStatusChange', {callStatus: CallStatus.Completed, duration});
-    this.logger.debug('RestCallSession: called party hung up');
+    this.logger.debug(`RestCallSession: called party hung up by ${terminatedBy}`);
     this._callReleased();
   }
 

lib/tasks/answer.js

@@ -0,0 +1,22 @@
+const Task = require('./task');
+const {TaskName, TaskPreconditions} = require('../utils/constants');
+
+/**
+ * Answer the call.
+ * Note: This is rarely used, as the call is typically answered automatically when required by the app,
+ * but it can be useful to force an answer before a pause in some cases
+ */
+class TaskAnswer extends Task {
+  constructor(logger, opts) {
+    super(logger, opts);
+    this.preconditions = TaskPreconditions.Endpoint;
+  }
+
+  get name() { return TaskName.Answer; }
+
+  async exec(cs) {
+    super.exec(cs);
+  }
+}
+
+module.exports = TaskAnswer;

lib/tasks/conference.js

@@ -6,6 +6,7 @@ const { normalizeJambones } = require('@jambonz/verb-specifications');
 const makeTask = require('./make_task');
 const bent = require('bent');
 const assert = require('assert');
+const HttpRequestor = require('../utils/http-requestor');
 const WAIT = 'wait';
 const JOIN = 'join';
 const START = 'start';
@@ -60,6 +61,8 @@ class Conference extends Task {
 
     this.emitter = new Emitter();
     this.results = {};
+    this.coaching = [];
+    this.speakOnlyTo = this.data.speakOnlyTo;
 
     // transferred from another server in order to bridge to a local caller?
     if (this.data._ && this.data._.connectTime) {
@@ -348,16 +351,29 @@ class Conference extends Task {
       Object.assign(opts, {flags: {
         ...(this.endConferenceOnExit && {endconf: true}),
         ...(this.startConferenceOnEnter && {moderator: true}),
-        ...(this.joinMuted && {joinMuted: true}),
+        //https://developer.signalwire.com/freeswitch/FreeSWITCH-Explained/Modules/mod_conference_3965534/
+        // mute |	Enter conference muted
+        ...((this.joinMuted || this.speakOnlyTo) && {mute: true}),
       }});
+
+      /**
+       * Note on the above: if we are joining in "coaching" mode (ie only going to heard by a subset of participants)
+       * then we join muted temporarily, and then unmute ourselves once we have identified the subset of participants
+       * to whom we will be speaking.
+       */
     }
 
     try {
       const {memberId, confUuid} = await this.ep.join(this.confName, opts);
       this.logger.debug({memberId, confUuid}, `Conference:_joinConference: successfully joined ${this.confName}`);
-      this.memberId = memberId;
+      this.memberId = parseInt(memberId, 10);
       this.confUuid = confUuid;
 
+      // set a tag for this member, if provided
+      if (this.data.memberTag) {
+        this.setMemberTag(this.data.memberTag);
+      }
+
       cs.setConferenceDetails(memberId, this.confName, confUuid);
       const response = await this.ep.api('conference', [this.confName, 'get', 'count']);
       if (response.body && /\d+/.test(response.body)) this.participantCount = parseInt(response.body);
@@ -384,6 +400,9 @@ class Conference extends Task {
           .catch((err) => {});
       }
 
+      if (this.speakOnlyTo) {
+        this.setCoachMode(this.speakOnlyTo);
+      }
     } catch (err) {
       this.logger.error(err, `Failed to join conference ${this.confName}`);
       throw err;
@@ -428,7 +447,15 @@ class Conference extends Task {
     }
   }
 
-  async doConferenceHold(cs, opts) {
+  doConferenceMute(cs, opts) {
+    assert (cs.isInConference);
+
+    const mute = opts.conf_mute_status === 'mute';
+    this.ep.api(`conference ${this.confName} ${mute ? 'mute' : 'unmute'} ${this.memberId}`)
+      .catch((err) => this.logger.info({err}, 'Error muting or unmuting participant'));
+  }
+
+  doConferenceHold(cs, opts) {
     assert (cs.isInConference);
 
     const {conf_hold_status, wait_hook} = opts;
@@ -465,6 +492,43 @@ class Conference extends Task {
     }
   }
 
+  async doConferenceParticipantAction(cs, opts) {
+    const {action, tag} = opts;
+
+    switch (action) {
+      case 'tag':
+        await this.setMemberTag(tag);
+        break;
+      case 'untag':
+        await this.clearMemberTag();
+        break;
+      case 'coach':
+        await this.setCoachMode(tag);
+        break;
+      case 'uncoach':
+        await this.clearCoachMode();
+        break;
+      case 'hold':
+        this.doConferenceHold(cs, {conf_hold_status: 'hold'});
+        break;
+      case 'unhold':
+        this.doConferenceHold(cs, {conf_hold_status: 'unhold'});
+        break;
+      case 'mute':
+        this.doConferenceMute(cs, {conf_mute_status: 'mute'});
+        break;
+      case 'unmute':
+        this.doConferenceMute(cs, {conf_mute_status: 'unmute'});
+        break;
+      case 'kick':
+        this.kickMember(cs);
+        break;
+      default:
+        this.logger.info(`Conference:doConferenceParticipantAction - unhandled action ${action}`);
+        break;
+    }
+  }
+
   async _doWaitHookWhileOnHold(cs, dlg, wait_hook) {
     do {
       try {
@@ -511,7 +575,7 @@ class Conference extends Task {
   _normalizeHook(cs, hook) {
     if (typeof hook === 'object') return hook;
     const url = hook.startsWith('/') ?
-      `${cs.application.requestor.baseUrl}${hook}` :
+      `${cs.application.requestor instanceof HttpRequestor ? cs.application.requestor.baseUrl : ''}${hook}` :
       hook;
 
     return { url } ;
@@ -530,7 +594,7 @@ class Conference extends Task {
       const response = await this.ep.api('conference', [this.confName, 'get', 'count']);
       if (response.body && confNoMatch(response.body)) this.participantCount = 0;
       else if (response.body && /^\d+$/.test(response.body)) this.participantCount = parseInt(response.body) - 1;
-      this.logger.debug({response}, `Conference:_doFinalMemberCheck conference count ${this.participantCount}`);
+      this.logger.debug(`Conference:_doFinalMemberCheck conference count ${this.participantCount}`);
     } catch (err) {
       this.logger.info({err}, 'Conference:_doFinalMemberCheck error retrieving count (we were probably kicked');
     }
@@ -642,11 +706,19 @@ class Conference extends Task {
   }
 
   // conference event handlers
+  _onAddMember(logger, cs, evt) {
+    const memberId = parseInt(evt.getHeader('Member-ID')) ;
+    if (this.speakOnlyTo) {
+      logger.debug(`Conference:_onAddMember - member ${memberId} added to ${this.confName}, updating coaching mode`);
+      this.setCoachMode(this.speakOnlyTo).catch(() => {});
+    }
+    else logger.debug(`Conference:_onAddMember - member ${memberId} added to conference ${this.confName}`);
+  }
   _onDelMember(logger, cs, evt) {
     const memberId = parseInt(evt.getHeader('Member-ID')) ;
     this.participantCount = parseInt(evt.getHeader('Conference-Size'));
     if (memberId === this.memberId) {
-      this.logger.info(`Conference:_onDelMember - I was dropped from conference ${this.confName}, task is complete`);
+      logger.info(`Conference:_onDelMember - I was dropped from conference ${this.confName}, task is complete`);
       this.replaceEndpointAndEnd(cs);
     }
   }
@@ -675,6 +747,99 @@ class Conference extends Task {
     }
   }
 
+  _onTag(logger, cs, evt) {
+    const memberId = parseInt(evt.getHeader('Member-ID')) ;
+    const tag = evt.getHeader('Tag') || '';
+    if (memberId !== this.memberId && this.speakOnlyTo) {
+      logger.info(`Conference:_onTag - member ${memberId} set tag to '${tag }'; updating coach mode accordingly`);
+      this.setCoachMode(this.speakOnlyTo).catch(() => {});
+    }
+  }
+
+  /**
+   * Set the conference to "coaching" mode, where the audio of the participant is only heard
+   * by a subset of the participants in the conference.
+   * We do this by first getting all of the members who do *not* have this tag, and then
+   * we configure this members audio to not be sent to them.
+   * @param {string} speakOnlyTo - tag of the members who should receive our audio
+   *
+   * N.B.: this feature requires jambonz patches to freeswitch mod_conference
+   */
+  async setCoachMode(speakOnlyTo) {
+    this.speakOnlyTo = speakOnlyTo;
+    if (!this.memberId) {
+      this.logger.info('Conference:_setCoachMode: no member id yet');
+      return;
+    }
+    try {
+      const members = (await this.ep.getNonMatchingConfParticipants(this.confName, speakOnlyTo))
+        .filter((m) => m !== this.memberId);
+      if (members.length === 0) {
+        this.logger.info({members}, 'Conference:_setCoachMode: all participants have the tag, so all will hear me');
+        if (this.coaching.length) {
+          await this.ep.api('conference', [this.confName, 'relate', this.memberId, this.coaching.join(','), 'clear']);
+          this.coaching = [];
+        }
+      }
+      else {
+        const memberList = members.join(',');
+        this.logger.info(`Conference:_setCoachMode: my audio will NOT be sent to ${memberList}`);
+        await this.ep.api('conference', [this.confName, 'relate', this.memberId, memberList, 'nospeak']);
+        this.coaching = members;
+      }
+    } catch (err) {
+      this.logger.error({err, speakOnlyTo}, '_setCoachMode: Error');
+    }
+  }
+
+  async clearCoachMode() {
+    if (!this.memberId) return;
+    try {
+      if (this.coaching.length === 0) {
+        this.logger.info('Conference:_clearCoachMode: no coaching mode to clear');
+      }
+      else {
+        const memberList = this.coaching.join(',');
+        this.logger.info(`Conference:_clearCoachMode: now sending my audio to all, including ${memberList}`);
+        await this.ep.api('conference', [this.confName, 'relate', this.memberId, memberList, 'clear']);
+      }
+      this.speakOnlyTo = null;
+      this.coaching = [];
+    } catch (err) {
+      this.logger.error({err}, '_clearCoachMode: Error');
+    }
+  }
+
+  async setMemberTag(tag) {
+    try {
+      await this.ep.api('conference', [this.confName, 'tag', this.memberId, tag]);
+      this.logger.info(`Conference:setMemberTag: set tag for ${this.memberId} to ${tag}`);
+      this.memberTag = tag;
+    } catch (err) {
+      this.logger.error({err}, `Error setting tag for ${this.memberId} to ${tag}`);
+    }
+  }
+
+  async clearMemberTag() {
+    try {
+      await this.ep.api('conference', [this.confName, 'tag', this.memberId]);
+      this.logger.info(`Conference:setMemberTag: clearing tag for ${this.memberId}`);
+      this.memberTag = null;
+    } catch (err) {
+      this.logger.error({err}, `Error clearing tag for ${this.memberId}`);
+    }
+  }
+
+  async kickMember(cs) {
+    assert(cs.isInConference);
+    try {
+      await this.ep.api('conference', [this.confName, 'kick', this.memberId]);
+      this.logger.info(`Conference:kickMember: kick ${this.memberId} out of conference ${this.confName}`);
+    } catch (err) {
+      this.logger.error({err}, `Error kicking member out of conference for ${this.memberId}`);
+    }
+  }
+
 }
 
 module.exports = Conference;

lib/tasks/config.js

@@ -1,15 +1,22 @@
 const Task = require('./task');
 const {TaskName, TaskPreconditions} = require('../utils/constants');
+const parseDecibels = require('../utils/parse-decibels');
 
 class TaskConfig extends Task {
   constructor(logger, opts) {
     super(logger, opts);
+
     [
       'synthesizer',
       'recognizer',
       'bargeIn',
       'record',
-      'listen'
+      'listen',
+      'transcribe',
+      'fillerNoise',
+      'actionHookDelayAction',
+      'boostAudioSignal',
+      'vad'
     ].forEach((k) => this[k] = this.data[k] || {});
 
     if ('notifyEvents' in this.data) {
@@ -30,6 +37,13 @@ class TaskConfig extends Task {
         if (this.bargeIn[k]) this.gatherOpts[k] = this.bargeIn[k];
       });
     }
+    if (this.transcribe?.enable) {
+      this.transcribeOpts = {
+        verb: 'transcribe',
+        ...this.transcribe
+      };
+      delete this.transcribeOpts.enable;
+    }
 
     if (this.data.reset) {
       if (typeof this.data.reset === 'string') this.data.reset = [this.data.reset];
@@ -37,7 +51,12 @@ class TaskConfig extends Task {
     else this.data.reset = [];
 
     if (this.bargeIn.sticky) this.autoEnable = true;
-    this.preconditions = (this.bargeIn.enable || this.record?.action || this.listen?.url || this.data.amd) ?
+    this.preconditions = (this.bargeIn.enable ||
+      this.record?.action ||
+      this.listen?.url ||
+      this.data.amd ||
+      'boostAudioSignal' in this.data ||
+      this.transcribe?.enable) ?
       TaskPreconditions.Endpoint :
       TaskPreconditions.None;
 
@@ -50,6 +69,10 @@ class TaskConfig extends Task {
   get hasRecognizer() { return Object.keys(this.recognizer).length; }
   get hasRecording() { return Object.keys(this.record).length; }
   get hasListen() { return Object.keys(this.listen).length; }
+  get hasTranscribe() { return Object.keys(this.transcribe).length; }
+  get hasDub() { return Object.keys(this.dub).length; }
+  get hasVad() { return Object.keys(this.vad).length; }
+  get hasFillerNoise() { return Object.keys(this.fillerNoise).length; }
 
   get summary() {
     const phrase = [];
@@ -72,9 +95,14 @@ class TaskConfig extends Task {
     if (this.hasListen) {
       phrase.push(this.listen.enable ? `listen ${this.listen.url}` : 'stop listen');
     }
+    if (this.hasTranscribe) {
+      phrase.push(this.transcribe.enable ? `transcribe ${this.transcribe.transcriptionHook}` : 'stop transcribe');
+    }
+    if (this.hasFillerNoise) phrase.push(`fillerNoise ${this.fillerNoise.enable ? 'on' : 'off'}`);
     if (this.data.amd) phrase.push('enable amd');
     if (this.notifyEvents) phrase.push(`event notification ${this.notifyEvents ? 'on' : 'off'}`);
     if (this.onHoldMusic) phrase.push(`onHoldMusic: ${this.onHoldMusic}`);
+    if ('boostAudioSignal' in this.data) phrase.push(`setGain ${this.data.boostAudioSignal}`);
     return `${this.name}{${phrase.join(',')}}`;
   }
 
@@ -113,9 +141,8 @@ class TaskConfig extends Task {
       cs.speechSynthesisVendor = this.synthesizer.vendor !== 'default'
         ? this.synthesizer.vendor
         : cs.speechSynthesisVendor;
-      cs.speechSynthesisLabel = this.synthesizer.label !== 'default'
-        ? this.synthesizer.label
-        : cs.speechSynthesisLabel;
+      cs.speechSynthesisLabel = this.synthesizer.label === 'default'
+        ? cs.speechSynthesisLabel : this.synthesizer.label;
       cs.speechSynthesisLanguage = this.synthesizer.language !== 'default'
         ?  this.synthesizer.language
         : cs.speechSynthesisLanguage;
@@ -127,15 +154,16 @@ class TaskConfig extends Task {
       cs.fallbackSpeechSynthesisVendor = this.synthesizer.fallbackVendor !== 'default'
         ? this.synthesizer.fallbackVendor
         : cs.fallbackSpeechSynthesisVendor;
-      cs.fallbackSpeechSynthesisLabel = this.synthesizer.fallbackLabel !== 'default'
-        ? this.synthesizer.fallbackLabel
-        : cs.fallbackSpeechSynthesisLabel;
+      cs.fallbackSpeechSynthesisLabel = this.synthesizer.fallbackLabel === 'default'
+        ? cs.fallbackSpeechSynthesisLabel : this.synthesizer.fallbackLabel;
       cs.fallbackSpeechSynthesisLanguage = this.synthesizer.fallbackLanguage !== 'default'
         ?  this.synthesizer.fallbackLanguage
         : cs.fallbackSpeechSynthesisLanguage;
       cs.fallbackSpeechSynthesisVoice = this.synthesizer.fallbackVoice !== 'default'
         ? this.synthesizer.fallbackVoice
         : cs.fallbackSpeechSynthesisVoice;
+      // new vendor is set, reset fallback vendor
+      cs.hasFallbackTts = false;
       this.logger.info({synthesizer: this.synthesizer}, 'Config: updated synthesizer');
     }
     if (this.hasRecognizer) {
@@ -143,9 +171,8 @@ class TaskConfig extends Task {
       cs.speechRecognizerVendor = this.recognizer.vendor !== 'default'
         ? this.recognizer.vendor
         : cs.speechRecognizerVendor;
-      cs.speechRecognizerLabel = this.recognizer.label !== 'default'
-        ? this.recognizer.label
-        : cs.speechRecognizerLabel;
+      cs.speechRecognizerLabel = this.recognizer.label === 'default'
+        ? cs.speechRecognizerLabel : this.recognizer.label;
       cs.speechRecognizerLanguage = this.recognizer.language !== 'default'
         ? this.recognizer.language
         : cs.speechRecognizerLanguage;
@@ -154,9 +181,9 @@ class TaskConfig extends Task {
       cs.fallbackSpeechRecognizerVendor = this.recognizer.fallbackVendor !== 'default'
         ? this.recognizer.fallbackVendor
         : cs.fallbackSpeechRecognizerVendor;
-      cs.fallbackSpeechRecognizerLabel = this.recognizer.fallbackLabel !== 'default'
-        ? this.recognizer.fallbackLabel
-        : cs.fallbackSpeechRecognizerLabel;
+      cs.fallbackSpeechRecognizerLabel = this.recognizer.fallbackLabel === 'default' ?
+        cs.fallbackSpeechRecognizerLabel :
+        this.recognizer.fallbackLabel;
       cs.fallbackSpeechRecognizerLanguage = this.recognizer.fallbackLanguage !== 'default'
         ? this.recognizer.fallbackLanguage
         : cs.fallbackSpeechRecognizerLanguage;
@@ -180,6 +207,8 @@ class TaskConfig extends Task {
       if ('punctuation' in this.recognizer) {
         cs.globalSttPunctuation = this.recognizer.punctuation;
       }
+      // new vendor is set, reset fallback vendor
+      cs.hasFallbackAsr = false;
       this.logger.info({
         recognizer: this.recognizer,
         isContinuousAsr: cs.isContinuousAsr
@@ -212,15 +241,63 @@ class TaskConfig extends Task {
       const {enable, ...opts} = this.listen;
       if (enable) {
         this.logger.debug({opts}, 'Config: enabling listen');
-        cs.startBackgroundListen({verb: 'listen', ...opts});
+        cs.startBackgroundTask('listen', {verb: 'listen', ...opts});
       } else {
         this.logger.info('Config: disabling listen');
-        cs.stopBackgroundListen();
+        cs.stopBackgroundTask('listen');
       }
     }
+    if (this.hasTranscribe) {
+      if (this.transcribe.enable) {
+        if (!this.transcribeOpts.recognizer) {
+          this.transcribeOpts.recognizer = this.hasRecognizer ?
+            this.recognizer :
+            {
+              vendor: cs.speechRecognizerVendor,
+              language: cs.speechRecognizerLanguage
+            };
+        }
+        this.logger.debug(this.transcribeOpts, 'Config: enabling transcribe');
+        cs.startBackgroundTask('transcribe', this.transcribeOpts);
+      } else {
+        this.logger.info('Config: disabling transcribe');
+        cs.stopBackgroundTask('transcribe');
+      }
+    }
+    if (Object.keys(this.actionHookDelayAction).length !== 0) {
+      cs.actionHookDelayProperties = this.actionHookDelayAction;
+    }
     if (this.data.sipRequestWithinDialogHook) {
       cs.sipRequestWithinDialogHook = this.data.sipRequestWithinDialogHook;
     }
+
+    if ('boostAudioSignal' in this.data) {
+      const db = parseDecibels(this.data.boostAudioSignal);
+      this.logger.info(`Config: boosting audio signal by ${db} dB`);
+      const args = [ep.uuid, 'setGain', db];
+      ep.api('uuid_dub', args).catch((err) => {
+        this.logger.error(err, 'Error boosting audio signal');
+      });
+    }
+
+    if (this.hasFillerNoise) {
+      const {enable, ...opts} = this.fillerNoise;
+      this.logger.info({fillerNoise: this.fillerNoise}, 'Config: fillerNoise');
+      if (!enable) cs.disableFillerNoise();
+      else {
+        cs.enableFillerNoise(opts);
+      }
+    }
+
+    if (this.hasVad) {
+      cs.vad = {
+        enable: this.vad.enable || false,
+        voiceMs: this.vad.voiceMs || 250,
+        silenceMs: this.vad.silenceMs || 150,
+        strategy: this.vad.strategy || 'one-shot',
+        mode: this.vad.mod || 2
+      };
+    }
   }
 
   async kill(cs) {

lib/tasks/dequeue.js

@@ -73,7 +73,8 @@ class TaskDequeue extends Task {
         try {
           let url;
           if (this.callSid) {
-            url = await retrieveByPatternSortedSet(this.queueName, `*${this.callSid}`);
+            const r = await retrieveByPatternSortedSet(this.queueName, `*${this.callSid}`);
+            url = r[0];
           } else {
             url = await retrieveFromSortedSet(this.queueName);
           }

lib/tasks/dial.js

@@ -14,6 +14,7 @@ const sessionTracker = require('../session/session-tracker');
 const DtmfCollector = require('../utils/dtmf-collector');
 const ConfirmCallSession = require('../session/confirm-call-session');
 const dbUtils = require('../utils/db-utils');
+const parseDecibels = require('../utils/parse-decibels');
 const debug = require('debug')('jambonz:feature-server');
 const {parseUri} = require('drachtio-srf');
 const {ANCHOR_MEDIA_ALWAYS, JAMBONZ_DISABLE_DIAL_PAI_HEADER} = require('../config');
@@ -100,6 +101,8 @@ class TaskDial extends Task {
     this.referHook = this.data.referHook;
     this.dtmfHook = this.data.dtmfHook;
     this.proxy = this.data.proxy;
+    this.tag = this.data.tag;
+    this.boostAudioSignal = this.data.boostAudioSignal;
 
     if (this.dtmfHook) {
       const {parentDtmfCollector, childDtmfCollector} = parseDtmfOptions(logger, this.data.dtmfCapture || {});
@@ -117,6 +120,9 @@ class TaskDial extends Task {
     if (this.data.transcribe) {
       this.transcribeTask = makeTask(logger, {'transcribe' : this.data.transcribe}, this);
     }
+    if (this.data.dub && Array.isArray(this.data.dub) && this.data.dub.length > 0) {
+      this.dubTasks = this.data.dub.map((d) => makeTask(logger, {'dub': d}, this));
+    }
 
     this.results = {};
     this.bridged = false;
@@ -138,15 +144,17 @@ class TaskDial extends Task {
 
   get name() { return TaskName.Dial; }
 
-  get isOnHold() {
-    return this.isIncomingLegHold || this.isOutgoingLegHold;
+  get isOnHoldEnabled() {
+    return !!this.data.onHoldHook;
   }
 
   get canReleaseMedia() {
     const keepAnchor = this.data.anchorMedia ||
     this.cs.isBackGroundListen ||
+    this.cs.onHoldMusic ||
     ANCHOR_MEDIA_ALWAYS ||
     this.listenTask ||
+    this.dubTasks ||
     this.transcribeTask ||
     this.startAmd;
 
@@ -323,7 +331,7 @@ class TaskDial extends Task {
         const by = parseUri(req.getParsedHeader('Referred-By').uri);
         this.logger.info({to}, 'refer to parsed');
         const json = await cs.requestor.request('verb:hook', this.referHook, {
-          ...callInfo,
+          ...(callInfo.toJSON()),
           refer_details: {
             sip_refer_to: req.get('Refer-To'),
             sip_referred_by: req.get('Referred-By'),
@@ -549,9 +557,9 @@ class TaskDial extends Task {
           const str = this.callerId || req.callingNumber || '';
           const callingNumber = str.startsWith('+') ? str.substring(1) : str;
           const voip_carrier_sid = await lookupCarrierByPhoneNumber(cs.accountSid, callingNumber);
-          this.logger.info(
-            `Dial:_attemptCalls: selected ${voip_carrier_sid} for requested phone number: ${callingNumber}`);
           if (voip_carrier_sid) {
+            this.logger.info(
+              `Dial:_attemptCalls: selected voip_carrier_sid ${voip_carrier_sid} for callingNumber: ${callingNumber}`);
             opts.headers['X-Requested-Carrier-Sid'] = voip_carrier_sid;
           }
         }
@@ -570,7 +578,8 @@ class TaskDial extends Task {
           accountInfo: cs.accountInfo,
           rootSpan: cs.rootSpan,
           startSpan: this.startSpan.bind(this),
-          dialTask: this
+          dialTask: this,
+          onHoldMusic: this.cs.onHoldMusic
         });
         this.dials.set(sd.callSid, sd);
 
@@ -627,6 +636,8 @@ class TaskDial extends Task {
               await this._connectSingleDial(cs, sd);
             } catch (err) {
               this.logger.info({err}, 'Dial:_attemptCalls - Error calling _connectSingleDial ');
+              sd.removeAllListeners();
+              this.kill(cs);
             }
           })
           .on('decline', () => {
@@ -679,22 +690,43 @@ class TaskDial extends Task {
   async _onReinvite(req, res) {
     try {
       let isHandled = false;
-      if (this.cs.onHoldMusic) {
-        if (isOnhold(req.body) && !this.epOther && !this.ep) {
-          await this.cs.handleReinviteAfterMediaReleased(req, res);
-          // Onhold but media is already released
-          // reconnect A Leg and Response B leg
-          await this.reAnchorMedia(this.cs, this.sd);
-          this.isOutgoingLegHold = true;
+      if (this.isOnHoldEnabled) {
+        if (isOnhold(req.body)) {
+          this.logger.debug('Dial: _onReinvite receive hold Request');
+          if (!this.epOther && !this.ep) {
+            this.logger.debug(`Dial: _onReinvite receive hold Request,
+ media already released, reconnect media server`);
+            // update caller leg for new SDP from callee.
+            await this.cs.handleReinviteAfterMediaReleased(req, res);
+            // Freeswitch media is released, reconnect
+            await this.reAnchorMedia(this.cs, this.sd);
+            this.isOutgoingLegHold = true;
+          } else {
+            this.logger.debug('Dial: _onReinvite receive hold Request, update SDP');
+            const newSdp = await this.ep.modify(req.body);
+            res.send(200, {body: newSdp});
+          }
           isHandled = true;
-          this._onHoldHook();
-        } else if (!isOnhold(req.body) && this.epOther && this.ep && this.isOutgoingLegHold && this.canReleaseMedia) {
-          // Offhold, time to release media
-          const newSdp = await this.ep.modify(req.body);
-          await res.send(200, {body: newSdp});
-          await this._releaseMedia(this.cs, this.sd);
+          // Media already connected, ask for onHoldHook
+          this._onHoldHook(req);
+        } else if (!isOnhold(req.body)) {
+          this.logger.debug('Dial: _onReinvite receive unhold Request');
+          if (this.epOther && this.ep && this.isOutgoingLegHold && this.canReleaseMedia) {
+            this.logger.debug('Dial: _onReinvite receive unhold Request, release media');
+            // Offhold, time to release media
+            const newSdp = await this.ep.modify(req.body);
+            await res.send(200, {body: newSdp});
+            await this._releaseMedia(this.cs, this.sd);
+            this.isOutgoingLegHold = false;
+          } else {
+            this.logger.debug('Dial: _onReinvite receive unhold Request, update media server');
+            const newSdp = await this.ep.modify(req.body);
+            res.send(200, {body: newSdp});
+          }
+          if (this._onHoldSession) {
+            this._onHoldSession.kill();
+          }
           isHandled = true;
-          this.isOutgoingLegHold = false;
         }
       }
       if (!isHandled) {
@@ -755,6 +787,17 @@ class TaskDial extends Task {
       dialCallSid: sd.callSid,
     });
 
+    if (this.dubTasks) {
+      for (const dub of this.dubTasks) {
+        try {
+          await dub.exec(cs, {ep: sd.ep});
+        }
+        catch (err) {
+          this.logger.error({err}, 'Dial:_selectSingleDial - error executing dubTask');
+        }
+      }
+    }
+
     if (this.parentDtmfCollector) this._installDtmfDetection(cs, cs.dlg);
     if (this.childDtmfCollector) this._installDtmfDetection(cs, this.dlg);
     if (cs.sipRequestWithinDialogHook) this._initSipIndialogRequestListener(cs, this.dlg);
@@ -769,6 +812,18 @@ class TaskDial extends Task {
       }
     }
 
+    /* boost audio signal if requested */
+    if (this.boostAudioSignal) {
+      try {
+        const db = parseDecibels(this.boostAudioSignal);
+        this.logger.info(`Dial: boosting audio signal by ${db} dB`);
+        const args = [this.ep.uuid, 'setGain', db];
+        await this.ep.api('uuid_dub', args);
+      } catch (err) {
+        this.logger.info({err}, 'Dial:_selectSingleDial - Error boosting audio signal');
+      }
+    }
+
     /* if we can release the media back to the SBC, do so now */
     if (this.canReleaseMedia) setTimeout(this._releaseMedia.bind(this, cs, sd), 200);
   }
@@ -811,23 +866,34 @@ class TaskDial extends Task {
     this.epOther = cs.ep;
   }
 
+  // Handle RE-INVITE hold from caller leg.
   async handleReinviteAfterMediaReleased(req, res) {
     let isHandled = false;
-    if (isOnhold(req.body) && !this.epOther && !this.ep) {
-      const sdp = await this.dlg.modify(req.body);
-      res.send(200, {body: sdp});
-      // Onhold but media is already released
-      await this.reAnchorMedia(this.cs, this.sd);
-      isHandled = true;
-      this.isIncomingLegHold = true;
-      this._onHoldHook();
-    } else if (!isOnhold(req.body) && this.epOther && this.ep && this.isIncomingLegHold && this.canReleaseMedia) {
-      // Offhold, time to release media
-      const newSdp = await this.epOther.modify(req.body);
-      await res.send(200, {body: newSdp});
-      await this._releaseMedia(this.cs, this.sd);
-      isHandled = true;
-      this.isIncomingLegHold = false;
+    if (this.isOnHoldEnabled) {
+      if (isOnhold(req.body)) {
+        if (!this.epOther && !this.ep) {
+          // update callee leg for new SDP from caller.
+          const sdp = await this.dlg.modify(req.body);
+          res.send(200, {body: sdp});
+          // Onhold but media is already released, reconnect
+          await this.reAnchorMedia(this.cs, this.sd);
+          isHandled = true;
+          this.isIncomingLegHold = true;
+        }
+        this._onHoldHook(req);
+      } else if (!isOnhold(req.body)) {
+        if (this.epOther && this.ep && this.isIncomingLegHold && this.canReleaseMedia) {
+          // Offhold, time to release media
+          const newSdp = await this.epOther.modify(req.body);
+          await res.send(200, {body: newSdp});
+          await this._releaseMedia(this.cs, this.sd);
+          isHandled = true;
+        }
+        this.isIncomingLegHold = false;
+        if (this._onHoldSession) {
+          this._onHoldSession.kill();
+        }
+      }
     }
 
     if (!isHandled) {
@@ -846,7 +912,7 @@ class TaskDial extends Task {
       });
   }
 
-  async _onHoldHook(allowed = [TaskName.Play, TaskName.Say, TaskName.Pause]) {
+  async _onHoldHook(req, allowed = [TaskName.Play, TaskName.Say, TaskName.Pause]) {
     if (this.data.onHoldHook) {
       // send silence for keep Voice quality
       await this.epOther.play('silence_stream://500');
@@ -856,7 +922,13 @@ class TaskDial extends Task {
           const b3 = this.getTracingPropagation();
           const httpHeaders = b3 && {b3};
           const json = await this.cs.application.requestor.
-            request('verb:hook', this.data.onHoldHook, this.cs.callInfo.toJSON(), httpHeaders);
+            request('verb:hook', this.data.onHoldHook, {
+              ...this.cs.callInfo.toJSON(),
+              hold_detail: {
+                from: req.get('From'),
+                to: req.get('To')
+              }
+            }, httpHeaders);
           const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));
           allowedTasks = tasks.filter((t) => allowed.includes(t.name));
           if (tasks.length !== allowedTasks.length) {
@@ -865,7 +937,7 @@ class TaskDial extends Task {
           }
           this.logger.debug(`DialTask:_onHoldHook: executing ${tasks.length} tasks`);
           if (tasks.length) {
-            this._playSession = new ConfirmCallSession({
+            this._onHoldSession = new ConfirmCallSession({
               logger: this.logger,
               application: this.cs.application,
               dlg: this.isIncomingLegHold ? this.dlg : this.cs.dlg,
@@ -875,12 +947,12 @@ class TaskDial extends Task {
               tasks,
               rootSpan: this.cs.rootSpan
             });
-            await this._playSession.exec();
-            this._playSession = null;
+            await this._onHoldSession.exec();
+            this._onHoldSession = null;
           }
         } catch (error) {
           this.logger.info(error, 'DialTask:_onHoldHook: failed retrieving waitHook');
-          this._playSession = null;
+          this._onHoldSession = null;
           break;
         }
       } while (allowedTasks && allowedTasks.length > 0 && !this.killed && this.isOnHold);

lib/tasks/dub.js

@@ -0,0 +1,144 @@
+const {TaskName} = require('../utils/constants');
+const TtsTask = require('./tts-task');
+const assert = require('assert');
+const parseDecibels = require('../utils/parse-decibels');
+
+/**
+ * Dub task: add or remove additional audio tracks into the call
+ */
+class TaskDub extends TtsTask {
+  constructor(logger, opts, parentTask) {
+    super(logger, opts, parentTask);
+
+    this.logger.debug({opts: this.data}, 'TaskDub constructor');
+    ['action', 'track', 'play', 'say', 'loop'].forEach((prop) => {
+      this[prop] = this.data[prop];
+    });
+    this.gain = parseDecibels(this.data.gain);
+
+    assert.ok(this.action, 'TaskDub: action is required');
+    assert.ok(this.track, 'TaskDub: track is required');
+  }
+
+  get name() { return TaskName.Dub; }
+
+  async exec(cs, {ep}) {
+    super.exec(cs);
+
+    try {
+      switch (this.action) {
+        case 'addTrack':
+          await this._addTrack(cs, ep);
+          break;
+        case 'removeTrack':
+          await this._removeTrack(cs, ep);
+          break;
+        case 'silenceTrack':
+          await this._silenceTrack(cs, ep);
+          break;
+        case 'playOnTrack':
+          await this._playOnTrack(cs, ep);
+          break;
+        case 'sayOnTrack':
+          await this._sayOnTrack(cs, ep);
+          break;
+        default:
+          throw new Error(`TaskDub: unsupported action ${this.action}`);
+      }
+    } catch (err) {
+      this.logger.error(err, 'Error executing dub task');
+    }
+  }
+
+  async _addTrack(cs, ep) {
+    this.logger.info(`adding track: ${this.track}`);
+    await ep.dub({
+      action: 'addTrack',
+      track: this.track
+    });
+
+    if (this.play) await this._playOnTrack(cs, ep);
+    else if (this.say) await this._sayOnTrack(cs, ep);
+  }
+
+  async _removeTrack(_cs, ep) {
+    this.logger.info(`removing track: ${this.track}`);
+    await ep.dub({
+      action: 'removeTrack',
+      track: this.track
+    });
+  }
+
+  async _silenceTrack(_cs, ep) {
+    this.logger.info(`silencing track: ${this.track}`);
+    await ep.dub({
+      action: 'silenceTrack',
+      track: this.track
+    });
+  }
+
+  async _playOnTrack(_cs, ep) {
+    this.logger.info(`playing on track: ${this.track}`);
+    await ep.dub({
+      action: 'playOnTrack',
+      track: this.track,
+      play: this.play,
+      loop: this.loop ? 'loop' : 'once',
+      gain: this.gain
+    });
+  }
+
+  async _sayOnTrack(cs, ep) {
+    const text = this.say.text || this.say;
+    this.synthesizer = this.say.synthesizer || {};
+
+    if (Object.keys(this.synthesizer).length) {
+      this.logger.info({synthesizer: this.synthesizer},
+        `saying on track ${this.track}: ${text} with synthesizer options`);
+    }
+    else {
+      this.logger.info(`saying on track ${this.track}: ${text}`);
+    }
+    this.synthesizer = this.synthesizer || {};
+
+    this.text = [text];
+
+    const vendor = this.synthesizer.vendor && this.synthesizer.vendor !== 'default' ?
+      this.synthesizer.vendor :
+      cs.speechSynthesisVendor;
+    const language = this.synthesizer.language && this.synthesizer.language !== 'default' ?
+      this.synthesizer.language :
+      cs.speechSynthesisLanguage ;
+    const voice =  this.synthesizer.voice && this.synthesizer.voice !== 'default' ?
+      this.synthesizer.voice :
+      cs.speechSynthesisVoice;
+    const label = this.synthesizer.label && this.synthesizer.label !== 'default' ?
+      this.synthesizer.label :
+      cs.speechSynthesisLabel;
+
+    const disableTtsStreaming = false;
+    const filepath = await this._synthesizeWithSpecificVendor(cs, ep, {
+      vendor, language, voice, label, disableTtsStreaming
+    });
+    assert.ok(filepath.length === 1, 'TaskDub: no filepath returned from synthesizer');
+
+    const path = filepath[0];
+    if (!path.startsWith('say:{')) {
+      /* we have a local file of mp3 or r8 of synthesized speech audio to play */
+      this.logger.info(`playing synthesized speech from file on track ${this.track}: ${path}`);
+      this.play = path;
+      await this._playOnTrack(cs, ep);
+    }
+    else {
+      this.logger.info(`doing actual text to speech file on track ${this.track}: ${path}`);
+      await ep.dub({
+        action: 'sayOnTrack',
+        track: this.track,
+        say: path,
+        gain: this.gain
+      });
+    }
+  }
+}
+
+module.exports = TaskDub;

lib/tasks/enqueue.js

@@ -338,6 +338,7 @@ class TaskEnqueue extends Task {
       this.logger.error({err}, `TaskEnqueue:_playHook error retrieving list info for queue ${this.queueName}`);
     }
     const json = await cs.application.requestor.request('verb:hook', hook, params, httpHeaders);
+    this.logger.debug({json}, 'TaskEnqueue:_playHook: received response from waitHook');
     const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));
 
     const allowedTasks = tasks.filter((t) => allowed.includes(t.name));

lib/tasks/gather.js

@@ -10,7 +10,9 @@ const {
   IbmTranscriptionEvents,
   NvidiaTranscriptionEvents,
   JambonzTranscriptionEvents,
-  AssemblyAiTranscriptionEvents
+  AssemblyAiTranscriptionEvents,
+  VadDetection,
+  VerbioTranscriptionEvents
 } = require('../utils/constants.json');
 const {
   JAMBONES_GATHER_EARLY_HINTS_MATCH,
@@ -27,9 +29,13 @@ class TaskGather extends SttTask {
     [
       'finishOnKey', 'input', 'numDigits', 'minDigits', 'maxDigits',
       'interDigitTimeout', 'partialResultHook', 'bargein', 'dtmfBargein',
-      'speechTimeout', 'timeout', 'say', 'play'
+      'speechTimeout', 'timeout', 'say', 'play', 'actionHookDelayAction', 'fillerNoise', 'vad'
     ].forEach((k) => this[k] = this.data[k]);
 
+    // gather default input is digits
+    if (!this.input) {
+      this.input = ['digits'];
+    }
     /* when collecting dtmf, bargein on dtmf is true unless explicitly set to false */
     if (this.dtmfBargein !== false  && this.input.includes('digits')) this.dtmfBargein = true;
 
@@ -37,7 +43,8 @@ class TaskGather extends SttTask {
     this.timeout = this.timeout === 0 ? 0 : (this.timeout || 15) * 1000;
     this.interim = !!this.partialResultHook || this.bargein || (this.timeout > 0);
     this.listenDuringPrompt = this.data.listenDuringPrompt === false ? false : true;
-    this.minBargeinWordCount = this.data.minBargeinWordCount || 1;
+    this.minBargeinWordCount = this.data.minBargeinWordCount !== undefined ? this.data.minBargeinWordCount : 1;
+    this._vadEnabled = this.minBargeinWordCount === 0;
     if (this.data.recognizer) {
       /* continuous ASR (i.e. compile transcripts until a special timeout or dtmf key) */
       this.asrTimeout = typeof this.data.recognizer.asrTimeout === 'number' ?
@@ -71,6 +78,7 @@ class TaskGather extends SttTask {
     /* buffer speech for continuous asr */
     this._bufferedTranscripts = [];
     this.partialTranscriptsCount = 0;
+    this.bugname_prefix = 'gather_';
   }
 
   get name() { return TaskName.Gather; }
@@ -86,6 +94,18 @@ class TaskGather extends SttTask {
       (this.playTask && this.playTask.earlyMedia);
   }
 
+  get hasFillerNoise() {
+    return Object.keys(this.fillerNoise).length > 0 && this.fillerNoise.enabled !== false;
+  }
+
+  get fillerNoiseUrl() {
+    return this.fillerNoise.url;
+  }
+
+  get fillerNoiseStartDelaySecs() {
+    return this.fillerNoise.startDelaySecs;
+  }
+
   get summary() {
     let s = `${this.name}{`;
     if (this.input.length === 2) s += 'inputs=[speech,digits],';
@@ -97,6 +117,7 @@ class TaskGather extends SttTask {
     }
     if (this.sayTask) s += ',with nested say task';
     if (this.playTask) s += ',with nested play task';
+    if (this.actionHookDelayAction) s += ',with actionHookDelayAction';
     s += '}';
     return s;
   }
@@ -106,6 +127,16 @@ class TaskGather extends SttTask {
     await super.exec(cs, {ep});
     const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, cs.srf);
 
+    this.fillerNoise = {
+      ...(cs.fillerNoise || {}),
+      ...(this.fillerNoise || {})
+    };
+
+    this.vad = {
+      ...(cs.vad || {}),
+      ...(this.vad || {})
+    };
+
     if (cs.hasGlobalSttHints && !this.maskGlobalSttHints) {
       const {hints, hintsBoost} = cs.globalSttHints;
       const setOfHints = new Set((this.data.recognizer.hints || [])
@@ -116,14 +147,6 @@ class TaskGather extends SttTask {
       this.logger.debug({hints: this.data.recognizer.hints, hintsBoost: this.data.recognizer.hintsBoost},
         'Gather:exec - applying global sttHints');
     }
-    if (cs.hasAltLanguages) {
-      this.data.recognizer.altLanguages = this.data.recognizer.altLanguages.concat(cs.altLanguages);
-      this.logger.debug({altLanguages: this.data.recognizer?.altLanguages},
-        'Gather:exec - applying altLanguages');
-    }
-    if (cs.hasGlobalSttPunctuation && !this.data.recognizer.punctuation) {
-      this.data.recognizer.punctuation = cs.globalSttPunctuation;
-    }
     if (!this.isContinuousAsr && cs.isContinuousAsr) {
       this.isContinuousAsr = true;
       this.asrTimeout = cs.asrTimeout * 1000;
@@ -141,6 +164,24 @@ class TaskGather extends SttTask {
       this.interim = true;
       this.logger.debug('Gather:exec - early hints match enabled');
     }
+
+    // if we have actionHook delay, and the session does as well, stash the session config
+    if (this.actionHookDelayAction) {
+      if (cs.actionHookDelayProcessor) {
+        this.logger.debug('Gather:exec - stashing session-level ahd proprerties');
+        cs.stashActionHookDelayProperties();
+      }
+      cs.actionHookDelayProperties = this.actionHookDelayAction;
+    }
+
+    this._startVad();
+
+    const startDtmfListener = () => {
+      if (this.input.includes('digits') || this.dtmfBargein || this.asrDtmfTerminationDigit) {
+        ep.on('dtmf', this._onDtmf.bind(this, cs, ep));
+      }
+    };
+
     const startListening = async(cs, ep) => {
       this._startTimer();
       if (this.isContinuousAsr && 0 === this.timeout) this._startAsrTimer();
@@ -154,12 +195,7 @@ class TaskGather extends SttTask {
           this._startTranscribing(ep);
           return updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid);
         } catch (e) {
-          if (this.fallbackVendor && this.isHandledByPrimaryProvider) {
-            await this._fallback();
-            startListening(cs, ep);
-          } else {
-            this.logger.error({error: e}, 'error in initSpeech');
-          }
+          await this._startFallback(cs, ep, {error: e});
         }
       }
     };
@@ -167,13 +203,12 @@ class TaskGather extends SttTask {
     try {
       if (this.sayTask) {
         const {span, ctx} = this.startChildSpan(`nested:${this.sayTask.summary}`);
-        this.sayTask.span = span;
-        this.sayTask.ctx = ctx;
-        this.sayTask.exec(cs, {ep});  // kicked off, _not_ waiting for it to complete
-        this.sayTask.on('playDone', (err) => {
-          span.end();
-          if (err) this.logger.error({err}, 'Gather:exec Error playing tts');
+        const process = () => {
           this.logger.debug('Gather: nested say task completed');
+          if (!this.listenDuringPrompt) {
+            startDtmfListener();
+          }
+          this._stopVad();
           if (!this.killed) {
             startListening(cs, ep);
             if (this.input.includes('speech') && this.vendor === 'nuance' && this.listenDuringPrompt) {
@@ -183,17 +218,27 @@ class TaskGather extends SttTask {
               });
             }
           }
+        };
+        this.sayTask.span = span;
+        this.sayTask.ctx = ctx;
+        this.sayTask.exec(cs, {ep})  // kicked off, _not_ waiting for it to complete
+          .catch((err) => {
+            process();
+          });
+        this.sayTask.on('playDone', (err) => {
+          span.end();
+          if (err) this.logger.error({err}, 'Gather:exec Error playing tts');
+          process();
         });
       }
       else if (this.playTask) {
         const {span, ctx} = this.startChildSpan(`nested:${this.playTask.summary}`);
-        this.playTask.span = span;
-        this.playTask.ctx = ctx;
-        this.playTask.exec(cs, {ep});  // kicked off, _not_ waiting for it to complete
-        this.playTask.on('playDone', (err) => {
-          span.end();
-          if (err) this.logger.error({err}, 'Gather:exec Error playing url');
+        const process = () => {
           this.logger.debug('Gather: nested play task completed');
+          if (!this.listenDuringPrompt) {
+            startDtmfListener();
+          }
+          this._stopVad();
           if (!this.killed) {
             startListening(cs, ep);
             if (this.input.includes('speech') && this.vendor === 'nuance' && this.listenDuringPrompt) {
@@ -203,6 +248,17 @@ class TaskGather extends SttTask {
               });
             }
           }
+        };
+        this.playTask.span = span;
+        this.playTask.ctx = ctx;
+        this.playTask.exec(cs, {ep})  // kicked off, _not_ waiting for it to complete
+          .catch((err) => {
+            process();
+          });
+        this.playTask.on('playDone', (err) => {
+          span.end();
+          if (err) this.logger.error({err}, 'Gather:exec Error playing url');
+          process();
         });
       }
       else {
@@ -215,30 +271,38 @@ class TaskGather extends SttTask {
 
       if (this.input.includes('speech') && this.listenDuringPrompt) {
         await this._setSpeechHandlers(cs, ep);
-        this._startTranscribing(ep);
-        updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid)
-          .catch(() => {/*already logged error */});
+        if (!this.resolved && !this.killed) {
+          this._startTranscribing(ep);
+          updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid)
+            .catch(() => {/*already logged error */});
+        }
+        else {
+          this.logger.info('Gather:exec - task was killed or resolved quickly, not starting transcription');
+        }
       }
 
-      if (this.input.includes('digits') || this.dtmfBargein || this.asrDtmfTerminationDigit) {
-        ep.on('dtmf', this._onDtmf.bind(this, cs, ep));
+      if (this.listenDuringPrompt) {
+        startDtmfListener();
       }
 
       await this.awaitTaskDone();
+      this._killAudio(cs);
     } catch (err) {
       this.logger.error(err, 'TaskGather:exec error');
     }
-    this.removeSpeechListeners(ep);
+    this.removeCustomEventListeners();
   }
 
   kill(cs) {
     super.kill(cs);
     this._killAudio(cs);
+    this._clearFillerNoiseTimer();
     this.ep.removeAllListeners('dtmf');
     clearTimeout(this.interDigitTimer);
     this._clearAsrTimer();
     this.playTask?.span.end();
     this.sayTask?.span.end();
+    this._stopVad();
     this._resolve('killed');
   }
 
@@ -268,8 +332,11 @@ class TaskGather extends SttTask {
     else if (this.input.includes('digits')) {
       if (this.digitBuffer.length === 0 && this.needsStt) {
         // DTMF is higher priority than STT.
-        this.removeSpeechListeners(ep);
-        ep.stopTranscription({vendor: this.vendor})
+        this.removeCustomEventListeners();
+        ep.stopTranscription({
+          vendor: this.vendor,
+          bugname: this.bugname,
+        })
           .catch((err) => this.logger.error({err},
             ` Received DTMF, Error stopping transcription for vendor ${this.vendor}`));
       }
@@ -305,38 +372,36 @@ class TaskGather extends SttTask {
       if (this.data.recognizer?.deepgramOptions?.shortUtterance) this.shortUtterance = true;
     }
 
-    const opts = this.setChannelVarsForStt(this, this.sttCredentials, this.data.recognizer);
+    const opts = this.setChannelVarsForStt(this, this.sttCredentials, this.language, this.data.recognizer);
     switch (this.vendor) {
       case 'google':
-        this.bugname = 'google_transcribe';
-        ep.addCustomEventListener(GoogleTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(GoogleTranscriptionEvents.EndOfUtterance, this._onEndOfUtterance.bind(this, cs, ep));
-        ep.addCustomEventListener(GoogleTranscriptionEvents.VadDetected, this._onVadDetected.bind(this, cs, ep));
+        this.bugname = `${this.bugname_prefix}google_transcribe`;
+        this.addCustomEventListener(
+          ep, GoogleTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        this.addCustomEventListener(
+          ep, GoogleTranscriptionEvents.EndOfUtterance, this._onEndOfUtterance.bind(this, cs, ep));
         break;
 
       case 'aws':
       case 'polly':
-        this.bugname = 'aws_transcribe';
-        ep.addCustomEventListener(AwsTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(AwsTranscriptionEvents.VadDetected, this._onVadDetected.bind(this, cs, ep));
+        this.bugname = `${this.bugname_prefix}aws_transcribe`;
+        this.addCustomEventListener(ep, AwsTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
         break;
       case 'microsoft':
-        this.bugname = 'azure_transcribe';
-        ep.addCustomEventListener(AzureTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(AzureTranscriptionEvents.NoSpeechDetected,
-          this._onNoSpeechDetected.bind(this, cs, ep));
-        ep.addCustomEventListener(AzureTranscriptionEvents.VadDetected, this._onVadDetected.bind(this, cs, ep));
+        this.bugname = `${this.bugname_prefix}azure_transcribe`;
+        this.addCustomEventListener(
+          ep, AzureTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        //this.addCustomEventListener(ep, AzureTranscriptionEvents.NoSpeechDetected,
+        //this._onNoSpeechDetected.bind(this, cs, ep));
         break;
       case 'nuance':
-        this.bugname = 'nuance_transcribe';
-        ep.addCustomEventListener(NuanceTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}nuance_transcribe`;
+        this.addCustomEventListener(ep, NuanceTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(NuanceTranscriptionEvents.StartOfSpeech,
+        this.addCustomEventListener(ep, NuanceTranscriptionEvents.StartOfSpeech,
           this._onStartOfSpeech.bind(this, cs, ep));
-        ep.addCustomEventListener(NuanceTranscriptionEvents.TranscriptionComplete,
+        this.addCustomEventListener(ep, NuanceTranscriptionEvents.TranscriptionComplete,
           this._onTranscriptionComplete.bind(this, cs, ep));
-        ep.addCustomEventListener(NuanceTranscriptionEvents.VadDetected,
-          this._onVadDetected.bind(this, cs, ep));
 
         /* stall timers until prompt finishes playing */
         if ((this.sayTask || this.playTask) && this.listenDuringPrompt) {
@@ -345,24 +410,30 @@ class TaskGather extends SttTask {
         break;
 
       case 'deepgram':
-        this.bugname = 'deepgram_transcribe';
-        ep.addCustomEventListener(DeepgramTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(DeepgramTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
-        ep.addCustomEventListener(DeepgramTranscriptionEvents.ConnectFailure,
+        this.bugname = `${this.bugname_prefix}deepgram_transcribe`;
+        this.addCustomEventListener(
+          ep, DeepgramTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        this.addCustomEventListener(ep, DeepgramTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
+        this.addCustomEventListener(ep, DeepgramTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep));
-
-        /* if app sets deepgramOptions.utteranceEndMs they essentially want continuous asr */
-        if (opts.DEEPGRAM_SPEECH_UTTERANCE_END_MS) this.isContinuousAsr = true;
         break;
 
       case 'soniox':
-        this.bugname = 'soniox_transcribe';
-        ep.addCustomEventListener(SonioxTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        this.bugname = `${this.bugname_prefix}soniox_transcribe`;
+        this.addCustomEventListener(
+          ep, SonioxTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        break;
+
+      case 'verbio':
+        this.bugname = `${this.bugname_prefix}verbio_transcribe`;
+        this.addCustomEventListener(
+          ep, VerbioTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
         break;
 
       case 'cobalt':
-        this.bugname = 'cobalt_transcribe';
-        ep.addCustomEventListener(CobaltTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        this.bugname = `${this.bugname_prefix}cobalt_transcribe`;
+        this.addCustomEventListener(
+          ep, CobaltTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
 
         /* cobalt doesnt have language, it has model, which is required */
         if (!this.data.recognizer.model) {
@@ -391,23 +462,21 @@ class TaskGather extends SttTask {
         break;
 
       case 'ibm':
-        this.bugname = 'ibm_transcribe';
-        ep.addCustomEventListener(IbmTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(IbmTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
-        ep.addCustomEventListener(IbmTranscriptionEvents.ConnectFailure,
+        this.bugname = `${this.bugname_prefix}ibm_transcribe`;
+        this.addCustomEventListener(ep, IbmTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        this.addCustomEventListener(ep, IbmTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
+        this.addCustomEventListener(ep, IbmTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep));
         break;
 
       case 'nvidia':
-        this.bugname = 'nvidia_transcribe';
-        ep.addCustomEventListener(NvidiaTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}nvidia_transcribe`;
+        this.addCustomEventListener(ep, NvidiaTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(NvidiaTranscriptionEvents.StartOfSpeech,
+        this.addCustomEventListener(ep, NvidiaTranscriptionEvents.StartOfSpeech,
           this._onStartOfSpeech.bind(this, cs, ep));
-        ep.addCustomEventListener(NvidiaTranscriptionEvents.TranscriptionComplete,
+        this.addCustomEventListener(ep, NvidiaTranscriptionEvents.TranscriptionComplete,
           this._onTranscriptionComplete.bind(this, cs, ep));
-        ep.addCustomEventListener(NvidiaTranscriptionEvents.VadDetected,
-          this._onVadDetected.bind(this, cs, ep));
 
         /* I think nvidia has this (??) - stall timers until prompt finishes playing */
         if ((this.sayTask || this.playTask) && this.listenDuringPrompt) {
@@ -416,20 +485,22 @@ class TaskGather extends SttTask {
         break;
 
       case 'assemblyai':
-        this.bugname = 'assemblyai_transcribe';
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}assemblyai_transcribe`;
+        this.addCustomEventListener(ep, AssemblyAiTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep));
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.Error, this._onVendorError.bind(this, cs, ep));
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.ConnectFailure,
+        this.addCustomEventListener(
+          ep, AssemblyAiTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
+        this.addCustomEventListener(ep, AssemblyAiTranscriptionEvents.Error, this._onVendorError.bind(this, cs, ep));
+        this.addCustomEventListener(ep, AssemblyAiTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep));
         break;
       default:
         if (this.vendor.startsWith('custom:')) {
-          this.bugname = `${this.vendor}_transcribe`;
-          ep.addCustomEventListener(JambonzTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-          ep.addCustomEventListener(JambonzTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
-          ep.addCustomEventListener(JambonzTranscriptionEvents.ConnectFailure,
+          this.bugname = `${this.bugname_prefix}${this.vendor}_transcribe`;
+          this.addCustomEventListener(
+            ep, JambonzTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+          this.addCustomEventListener(ep, JambonzTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
+          this.addCustomEventListener(ep, JambonzTranscriptionEvents.ConnectFailure,
             this._onVendorConnectFailure.bind(this, cs, ep));
           break;
         }
@@ -441,7 +512,7 @@ class TaskGather extends SttTask {
     }
 
     /* common handler for all stt engine errors */
-    ep.addCustomEventListener(JambonzTranscriptionEvents.Error, this._onJambonzError.bind(this, cs, ep));
+    this.addCustomEventListener(ep, JambonzTranscriptionEvents.Error, this._onJambonzError.bind(this, cs, ep));
     await ep.set(opts)
       .catch((err) => this.logger.info(err, 'Error setting channel variables'));
   }
@@ -482,9 +553,8 @@ class TaskGather extends SttTask {
     this._clearTimer();
     this._timeoutTimer = setTimeout(() => {
       if (this.isContinuousAsr) this._startAsrTimer();
-      else if (this.interDigitTimeout <= 0 ||
-        this.digitBuffer.length < this.minDigits ||
-        this.needsStt && this.digitBuffer.length === 0) {
+      if (this.interDigitTimer) return; // let the inter-digit timer complete
+      else {
         this._resolve(this.digitBuffer.length >= this.minDigits ? 'dtmf-num-digits' : 'timeout');
       }
     }, this.timeout);
@@ -494,7 +564,9 @@ class TaskGather extends SttTask {
     if (this._timeoutTimer) {
       clearTimeout(this._timeoutTimer);
       this._timeoutTimer = null;
+      return true;
     }
+    return false;
   }
 
   _startAsrTimer() {
@@ -503,17 +575,25 @@ class TaskGather extends SttTask {
     this._clearAsrTimer();
     this._asrTimer = setTimeout(() => {
       this.logger.debug('_startAsrTimer - asr timer went off');
-      const evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language);
+      const evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
       this._resolve(this._bufferedTranscripts.length > 0 ? 'speech' : 'timeout', evt);
     }, this.asrTimeout);
     this.logger.debug(`_startAsrTimer: set for ${this.asrTimeout}ms`);
   }
 
   _clearAsrTimer() {
-    if (this._asrTimer) clearTimeout(this._asrTimer);
+    if (this._asrTimer) {
+      this.logger.debug('_clearAsrTimer: asrTimer cleared');
+      clearTimeout(this._asrTimer);
+    }
     this._asrTimer = null;
   }
 
+  _hangupCall() {
+    this.logger.debug('_hangupCall');
+    this.cs.hangup();
+  }
+
   _startFastRecognitionTimer(evt) {
     assert(this.fastRecognitionTimeout > 0);
     this._clearFastRecognitionTimer();
@@ -534,7 +614,7 @@ class TaskGather extends SttTask {
     this._clearFinalAsrTimer();
     this._finalAsrTimer = setTimeout(() => {
       this.logger.debug('_startFinalAsrTimer - final asr timer went off');
-      const evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language);
+      const evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
       this._resolve(this._bufferedTranscripts.length > 0 ? 'speech' : 'timeout', evt);
     }, 1000);
     this.logger.debug('_startFinalAsrTimer: set for 1 second');
@@ -545,11 +625,65 @@ class TaskGather extends SttTask {
     this._finalAsrTimer = null;
   }
 
+
+  _startVad() {
+    if (!this._vadStarted && this._vadEnabled) {
+      this.logger.debug('_startVad');
+      this.addCustomEventListener(this.ep, VadDetection.Detection, this._onVadDetected.bind(this, this.cs, this.ep));
+      this.ep?.startVadDetection(this.vad);
+      this._vadStarted = true;
+    }
+  }
+
+  _stopVad() {
+    if (this._vadStarted) {
+      this.logger.debug('_stopVad');
+      this.ep?.stopVadDetection(this.vad);
+      this.ep?.removeCustomEventListener(VadDetection.Detection, this._onVadDetected);
+      this._vadStarted = false;
+    }
+  }
+
+  _startFillerNoise() {
+    this.logger.debug('Gather:_startFillerNoise - playing filler noise');
+    this.ep?.play(this.fillerNoise.url);
+    this._fillerNoiseOn = true;
+    this.ep.once('playback-start', (evt) => {
+      if (evt.file === this.fillerNoise.url && !this._fillerNoiseOn) {
+        this.logger.info({evt}, 'Gather:_startFillerNoise - race condition - kill filler noise here');
+        this.ep.api('uuid_break', this.ep.uuid)
+          .catch((err) => this.logger.info(err, 'Error killing filler noise'));
+        return;
+      } else this.logger.debug({evt}, 'Gather:_startFillerNoise - playback started');
+    });
+  }
+
+  _startFillerNoiseTimer() {
+    this._clearFillerNoiseTimer();
+    this._fillerNoiseTimer = setTimeout(() => {
+      this.logger.debug('Gather:_startFillerNoiseTimer - playing filler noise');
+      this._startFillerNoise();
+    }, this.fillerNoise.startDelaySecs * 1000);
+  }
+
+  _clearFillerNoiseTimer() {
+    if (this._fillerNoiseTimer) clearTimeout(this._fillerNoiseTimer);
+    this._fillerNoiseTimer = null;
+  }
+
+  _killFillerNoise() {
+    if (this._fillerNoiseTimer) {
+      this.logger.debug('Gather:_killFillerNoise');
+      this.ep?.api('uuid_break', this.ep.uuid);
+    }
+  }
+
   _killAudio(cs) {
-    if (!this.sayTask && !this.playTask && this.bargein) {
-      if (this.ep?.connected && !this.playComplete) {
+    if (this.hasFillerNoise || (!this.sayTask && !this.playTask && this.bargein)) {
+      if (this.ep?.connected && (!this.playComplete || this.hasFillerNoise)) {
         this.logger.debug('Gather:_killAudio: killing playback of any audio');
         this.playComplete = true;
+        this._fillerNoiseOn = false;  // in a race, if we just started audio it may sneak through here
         this.ep.api('uuid_break', this.ep.uuid)
           .catch((err) => this.logger.info(err, 'Error killing audio'));
       }
@@ -571,11 +705,11 @@ class TaskGather extends SttTask {
     // make sure this is not a transcript from answering machine detection
     const bugname = fsEvent.getHeader('media-bugname');
     const finished = fsEvent.getHeader('transcription-session-finished');
-    this.logger.debug({evt, bugname, finished}, `Gather:_onTranscription for vendor ${this.vendor}`);
+    this.logger.debug({evt, bugname, finished, vendor: this.vendor}, 'Gather:_onTranscription raw transcript');
     if (bugname && this.bugname !== bugname) return;
+    if (finished === 'true') return;
 
     if (this.vendor === 'ibm' && evt?.state === 'listening') return;
-
     if (this.vendor === 'deepgram' && evt.type === 'UtteranceEnd') {
       /* we will only get this when we have set utterance_end_ms */
       if (this._bufferedTranscripts.length === 0) {
@@ -583,18 +717,35 @@ class TaskGather extends SttTask {
       }
       else {
         this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram, return buffered transcript');
-        evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language);
+        evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
         this._bufferedTranscripts = [];
         this._resolve('speech', evt);
       }
       return;
     }
+    if (this.vendor === 'deepgram' && evt.type === 'Metadata') {
+      this.logger.debug('Gather:_onTranscription - discarding Metadata event from deepgram');
+      return;
+    }
+
+    evt = this.normalizeTranscription(evt, this.vendor, 1, this.language,
+      this.shortUtterance, this.data.recognizer.punctuation);
+    //this.logger.debug({evt, bugname, finished, vendor: this.vendor}, 'Gather:_onTranscription normalized transcript');
 
-    evt = this.normalizeTranscription(evt, this.vendor, 1, this.language, this.shortUtterance);
     if (evt.alternatives.length === 0) {
       this.logger.info({evt}, 'TaskGather:_onTranscription - got empty transcript, continue listening');
       return;
     }
+    const confidence = evt.alternatives[0].confidence;
+    const minConfidence = this.data.recognizer?.minConfidence;
+    this.logger.debug({evt},
+      `TaskGather:_onTranscription - confidence (${confidence}), minConfidence (${minConfidence})`);
+    if (confidence && minConfidence && confidence < minConfidence) {
+      this.logger.info({evt},
+        'TaskGather:_onTranscription - Transcript confidence ' +
+        `(${confidence}) < minConfidence (${minConfidence})`);
+      return this._resolve('stt-low-confidence', evt);
+    }
 
     /* fast path: our first partial transcript exactly matches an early hint */
     if (this.earlyHintsMatch && evt.is_final === false && this.partialTranscriptsCount++ === 0) {
@@ -616,7 +767,9 @@ class TaskGather extends SttTask {
     if (evt.is_final) {
       if (evt.alternatives[0].transcript === '' && !this.callSession.callGone && !this.killed) {
         emptyTranscript = true;
-        if (finished === 'true' && ['microsoft', 'deepgram'].includes(this.vendor)) {
+        if (finished === 'true' &&
+          ['microsoft', 'deepgram'].includes(this.vendor) &&
+          this._bufferedTranscripts.length === 0) {
           this.logger.debug({evt}, 'TaskGather:_onTranscription - got empty transcript from old gather, disregarding');
           return;
         }
@@ -650,7 +803,7 @@ class TaskGather extends SttTask {
         this._clearTimer();
         if (this._finalAsrTimer) {
           this._clearFinalAsrTimer();
-          const evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language);
+          const evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
           return this._resolve(this._bufferedTranscripts.length > 0 ? 'speech' : 'timeout', evt);
         }
         this._startAsrTimer();
@@ -659,47 +812,59 @@ class TaskGather extends SttTask {
         if (!['soniox', 'aws', 'microsoft', 'deepgram'].includes(this.vendor)) this._startTranscribing(ep);
       }
       else {
+        /* this was removed to fix https://github.com/jambonz/jambonz-feature-server/issues/783 */
+        /*
         if (this.bargein && (words + bufferedWords) < this.minBargeinWordCount) {
           this.logger.debug({evt, words, bufferedWords},
             'TaskGather:_onTranscription - final transcript but < min barge words');
-          this._bufferedTranscripts.push(evt);
-          this._startTranscribing(ep);
+          if (!emptyTranscript) this._bufferedTranscripts.push(evt);
+          if (!['soniox', 'aws', 'microsoft', 'deepgram'].includes(this.vendor)) this._startTranscribing(ep);
           return;
         }
         else {
-          if (this.vendor === 'soniox') {
-            /* compile transcripts into one */
-            this._sonioxTranscripts.push(evt.vendor.finalWords);
-            evt = this.compileSonioxTranscripts(this._sonioxTranscripts, 1, this.language);
-            this._sonioxTranscripts = [];
-          }
-          else if (this.vendor === 'deepgram') {
-            /* compile transcripts into one */
-            if (!emptyTranscript) this._bufferedTranscripts.push(evt);
-            if (this.data.recognizer?.deepgramOptions?.utteranceEndMs) {
-              this.logger.debug('TaskGather:_onTranscription - got speech_final waiting for UtteranceEnd event');
-              return;
-            }
-            this.logger.debug({evt}, 'TaskGather:_onTranscription - compiling deepgram transcripts');
-            evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language);
-            this._bufferedTranscripts = [];
-            this.logger.debug({evt}, 'TaskGather:_onTranscription - compiled deepgram transcripts');
-          }
-
-          /* here is where we return a final transcript */
-          this._resolve('speech', evt);
+        */
+        if (this.vendor === 'soniox') {
+          /* compile transcripts into one */
+          this._sonioxTranscripts.push(evt.vendor.finalWords);
+          evt = this.compileSonioxTranscripts(this._sonioxTranscripts, 1, this.language);
+          this._sonioxTranscripts = [];
         }
+        else if (this.vendor === 'deepgram') {
+          /* compile transcripts into one */
+          if (!emptyTranscript) this._bufferedTranscripts.push(evt);
+
+          /* deepgram can send an empty and final transcript; only if we have any buffered should we resolve */
+          if (this._bufferedTranscripts.length === 0) return;
+          evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language, this.vendor);
+          this._bufferedTranscripts = [];
+        }
+
+        /* here is where we return a final transcript */
+        this._resolve('speech', evt);
+        /*}*/
       }
     }
     else {
-      this._clearTimer();
-      this._startTimer();
-      if (this.bargein && (words + bufferedWords) >= this.minBargeinWordCount) {
-        if (!this.playComplete) {
-          this.logger.debug({transcript: evt.alternatives[0].transcript}, 'killing audio due to speech');
-          this.emit('vad');
+      /* deepgram can send a non-final transcript but with words that are final, so we need to buffer */
+      let emptyTranscript = false;
+      if (this.vendor === 'deepgram') {
+        const originalEvent = evt.vendor.evt;
+        if (originalEvent.is_final && evt.alternatives[0].transcript !== '') {
+          this.logger.debug({evt}, 'Gather:_onTranscription - buffering a completed (partial) deepgram transcript');
+          this._bufferedTranscripts.push(evt);
+        }
+        if (evt.alternatives[0].transcript === '') emptyTranscript = true;
+      }
+
+      if (!emptyTranscript) {
+        if (this._clearTimer()) this._startTimer();
+        if (this.bargein && (words + bufferedWords) >= this.minBargeinWordCount) {
+          if (!this.playComplete) {
+            this.logger.debug({transcript: evt.alternatives[0].transcript}, 'killing audio due to speech');
+            this.emit('vad');
+          }
+          this._killAudio(cs);
         }
-        this._killAudio(cs);
       }
       if (this.fastRecognitionTimeout) {
         this._startFastRecognitionTimer(evt);
@@ -717,14 +882,9 @@ class TaskGather extends SttTask {
           this._sonioxTranscripts.push(evt.vendor.finalWords);
         }
       }
-      /* deepgram can send a non-final transcript but with words that are final, so we need to buffer */
-      if (this.vendor === 'deepgram') {
-        const originalEvent = evt.vendor.evt;
-        if (originalEvent.is_final && evt.alternatives[0].transcript !== '') {
-          this.logger.debug({evt}, 'Gather:_onTranscription - buffering a completed (partial) deepgram transcript');
-          this._bufferedTranscripts.push(evt);
-        }
-      }
+
+      /* restart asr timer if we get a partial transcript */
+      if (this.isContinuousAsr) this._startAsrTimer();
     }
   }
   _onEndOfUtterance(cs, ep) {
@@ -756,24 +916,45 @@ class TaskGather extends SttTask {
   _onTranscriptionComplete(cs, ep) {
     this.logger.debug('TaskGather:_onTranscriptionComplete');
   }
-  async _onJambonzError(cs, ep, evt) {
-    this.logger.info({evt}, 'TaskGather:_onJambonzError');
-    if (this.isHandledByPrimaryProvider && this.fallbackVendor) {
-      ep.stopTranscription({vendor: this.vendor})
+
+  async _startFallback(cs, ep, evt) {
+    if (this.canFallback) {
+      ep.stopTranscription({
+        vendor: this.vendor,
+        bugname: this.bugname
+      })
         .catch((err) => this.logger.error({err}, `Error stopping transcription for primary vendor ${this.vendor}`));
       const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, cs.srf);
       try {
-        await this._fallback();
-        await this._initSpeech(cs, ep);
+        this.logger.debug('gather:_startFallback');
+        this.notifyError({ msg: 'ASR error',
+          details:`STT Vendor ${this.vendor} error: ${evt.error || evt.reason}`, failover: 'in progress'});
+        await this._initFallback();
+        this._speechHandlersSet = false;
+        await this._setSpeechHandlers(cs, ep);
         this._startTranscribing(ep);
         updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid);
-        return;
+        return true;
       } catch (error) {
         this.logger.info({error}, `There is error while falling back to ${this.fallbackVendor}`);
+        this.notifyError({ msg: 'ASR error',
+          details:`STT Vendor ${this.vendor} error: ${evt.error || evt.reason}`, failover: 'not available'});
       }
+    } else {
+      this.logger.debug('gather:_startFallback no condition for falling back');
+      this.notifyError({ msg: 'ASR error',
+        details:`STT Vendor ${this.vendor} error: ${evt.error || evt.reason}`, failover: 'not available'});
     }
-    const {writeAlerts, AlertType} = cs.srf.locals;
+    return false;
+  }
 
+  async _onJambonzError(cs, ep, evt) {
+    if (this.vendor === 'google' && evt.error_code === 0) {
+      this.logger.info({evt}, 'TaskTranscribe:_onJambonzError - ignoring google error code 0');
+      return;
+    }
+    this.logger.info({evt}, 'TaskGather:_onJambonzError');
+    const {writeAlerts, AlertType} = cs.srf.locals;
     if (this.vendor === 'nuance') {
       const {code, error} = evt;
       if (code === 404 && error === 'No speech') return this._resolve('timeout');
@@ -786,17 +967,23 @@ class TaskGather extends SttTask {
       message: `Custom speech vendor ${this.vendor} error: ${evt.error}`,
       vendor: this.vendor,
     }).catch((err) => this.logger.info({err}, 'Error generating alert for jambonz custom connection failure'));
-    this.notifyError({msg: 'ASR error', details:`Custom speech vendor ${this.vendor} error: ${evt.error}`});
+    if (!(await this._startFallback(cs, ep, evt))) {
+      this.notifyTaskDone();
+    }
   }
 
-  _onVendorConnectFailure(cs, _ep, evt) {
+  async _onVendorConnectFailure(cs, _ep, evt) {
     super._onVendorConnectFailure(cs, _ep, evt);
-    this.notifyTaskDone();
+    if (!(await this._startFallback(cs, _ep, evt))) {
+      this.notifyTaskDone();
+    }
   }
 
-  _onVendorError(cs, _ep, evt) {
+  async _onVendorError(cs, _ep, evt) {
     super._onVendorError(cs, _ep, evt);
-    this._resolve('stt-error', evt);
+    if (!(await this._startFallback(cs, _ep, evt))) {
+      this._resolve('stt-error', evt);
+    }
   }
 
   _onVadDetected(cs, ep) {
@@ -805,6 +992,10 @@ class TaskGather extends SttTask {
       this._killAudio(cs);
       this.emit('vad');
     }
+    if (this.vad?.strategy === 'one-shot') {
+      this.ep?.removeCustomEventListener(VadDetection.Detection, this._onVadDetected);
+      this._vadStarted = false;
+    }
   }
 
   _onNoSpeechDetected(cs, ep, evt, fsEvent) {
@@ -823,26 +1014,38 @@ class TaskGather extends SttTask {
 
   async _resolve(reason, evt) {
     this.logger.debug(`TaskGather:resolve with reason ${reason}`);
-    if (this.resolved) return;
+    if (this.needsStt && this.ep && this.ep.connected) {
+      this.ep.stopTranscription({
+        vendor: this.vendor,
+        bugname: this.bugname
+      })
+        .catch((err) => {
+          if (this.resolved) return;
+          this.logger.error({err}, 'Error stopping transcription');
+        });
+    }
+    if (this.resolved) {
+      this.logger.debug('TaskGather:_resolve - already resolved');
+      return;
+    }
 
     this.resolved = true;
-    // Clear dtmf event
-    if (this.dtmfBargein) {
-      this.ep.removeAllListeners('dtmf');
-    }
+    // If bargin is false and ws application return ack to verb:hook
+    // the gather should not play any audio
+    this._killAudio(this.cs);
+    // Clear dtmf events, to avoid any case can leak the listener, just clean it
+    this.ep.removeAllListeners('dtmf');
     clearTimeout(this.interDigitTimer);
     this._clearTimer();
     this._clearFastRecognitionTimer();
+    this._clearAsrTimer();
+    this._clearFinalAsrTimer();
 
     this.span.setAttributes({
       channel: 1,
       'stt.resolve': reason,
       'stt.result': JSON.stringify(evt)
     });
-    if (this.needsStt && this.ep && this.ep.connected) {
-      this.ep.stopTranscription({vendor: this.vendor})
-        .catch((err) => this.logger.error({err}, 'Error stopping transcription'));
-    }
 
     if (this.callSession && this.callSession.callGone) {
       this.logger.debug('TaskGather:_resolve - call is gone, not invoking web callback');
@@ -850,36 +1053,82 @@ class TaskGather extends SttTask {
       return;
     }
 
+    // action hook delay
+    if (this.cs.actionHookDelayProcessor) {
+      this.logger.debug('TaskGather:_resolve - actionHookDelayProcessor exists - starting it');
+      this.cs.actionHookDelayProcessor.start();
+    }
+
+    // TODO: remove and implement as actionHookDelay
+    if (this.hasFillerNoise && (reason.startsWith('dtmf') || reason.startsWith('speech'))) {
+      if (this.fillerNoiseStartDelaySecs > 0) {
+        this._startFillerNoiseTimer();
+      }
+      else {
+        this.logger.debug(`TaskGather:_resolve - playing filler noise: ${this.fillerNoiseUrl}`);
+        this._startFillerNoise();
+      }
+    }
+
+    let returnedVerbs = false;
     try {
       if (reason.startsWith('dtmf')) {
         if (this.parentTask) this.parentTask.emit('dtmf', evt);
         else {
           this.emit('dtmf', evt);
-          await this.performAction({digits: this.digitBuffer, reason: 'dtmfDetected'});
+          returnedVerbs = await this.performAction({digits: this.digitBuffer, reason: 'dtmfDetected'});
         }
       }
       else if (reason.startsWith('speech')) {
         if (this.parentTask) this.parentTask.emit('transcription', evt);
         else {
           this.emit('transcription', evt);
-          await this.performAction({speech: evt, reason: 'speechDetected'});
+          this.logger.debug('TaskGather:_resolve - invoking performAction');
+          returnedVerbs = await this.performAction({speech: evt, reason: 'speechDetected'});
+          this.logger.debug({returnedVerbs}, 'TaskGather:_resolve - back from performAction');
         }
       }
       else if (reason.startsWith('timeout')) {
         if (this.parentTask) this.parentTask.emit('timeout', evt);
         else {
           this.emit('timeout', evt);
-          await this.performAction({reason: 'timeout'});
+          returnedVerbs = await this.performAction({reason: 'timeout'});
         }
       }
       else if (reason.startsWith('stt-error')) {
         if (this.parentTask) this.parentTask.emit('stt-error', evt);
         else {
           this.emit('stt-error', evt);
-          await this.performAction({reason: 'error', details: evt.error});
+          returnedVerbs = await this.performAction({reason: 'error', details: evt.error});
+        }
+      } else if (reason.startsWith('stt-low-confidence')) {
+        if (this.parentTask) this.parentTask.emit('stt-low-confidence', evt);
+        else {
+          this.emit('stt-low-confidence', evt);
+          returnedVerbs = await this.performAction({reason: 'stt-low-confidence'});
         }
       }
     } catch (err) {  /*already logged error*/ }
+
+    // Gather got response from hook, cancel actionHookDelay processing
+    this.logger.debug('TaskGather:_resolve - checking ahd');
+    if (this.cs.actionHookDelayProcessor) {
+      if (returnedVerbs) {
+        this.logger.debug('TaskGather:_resolve - got response from action hook, cancelling actionHookDelay');
+        await this.cs.actionHookDelayProcessor.stop();
+        if (this.actionHookDelayAction && !this.cs.popActionHookDelayProperties()) {
+          // no session level ahd was running when this task started, so clear it
+          this.cs.clearActionHookDelayProcessor();
+          this.logger.debug('TaskGather:_resolve - clear ahd');
+        }
+      }
+      else {
+        this.logger.debug('TaskGather:_resolve - no response from action hook, continue actionHookDelay');
+      }
+    }
+
+    this._clearFillerNoiseTimer();
+
     this.notifyTaskDone();
   }
 }

lib/tasks/listen.js

@@ -8,6 +8,10 @@ const DTMF_SPAN_NAME = 'dtmf';
 class TaskListen extends Task {
   constructor(logger, opts, parentTask) {
     super(logger, opts);
+    /**
+     * @deprecated
+     * use bidirectionalAudio.enabled
+     */
     this.disableBidirectionalAudio = opts.disableBidirectionalAudio;
     this.preconditions = TaskPreconditions.Endpoint;
 
@@ -25,6 +29,15 @@ class TaskListen extends Task {
     this.results = {};
     this.playAudioQueue = [];
     this.isPlayingAudioFromQueue = false;
+    this.bidirectionalAudio = {
+      enabled: this.disableBidirectionalAudio === true ? false : true,
+      ...(this.data['bidirectionalAudio']),
+    };
+
+    // From drachtio-version 3.0.40, forkAudioStart will send empty bugname, metadata together with
+    // bidirectionalAudio params that cause old version of freeswitch missunderstand between bugname and
+    // bidirectionalAudio params
+    this._bugname = 'audio_fork';
 
     if (this.transcribe) this.transcribeTask = makeTask(logger, {'transcribe': opts.transcribe}, this);
   }
@@ -123,8 +136,6 @@ class TaskListen extends Task {
       ci,
       this.metadata);
     if (this.hook.auth) {
-      this.logger.debug({username: this.hook.auth.username, password: this.hook.auth.password},
-        'TaskListen:_startListening basic auth');
       await this.ep.set({
         'MOD_AUDIO_BASIC_AUTH_USERNAME': this.hook.auth.username,
         'MOD_AUDIO_BASIC_AUTH_PASSWORD': this.hook.auth.password
@@ -135,7 +146,8 @@ class TaskListen extends Task {
       mixType: this.mixType,
       sampling: this.sampleRate,
       ...(this._bugname && {bugname: this._bugname}),
-      metadata
+      metadata,
+      bidirectionalAudio: this.bidirectionalAudio || {}
     });
     this.recordStartTime = moment();
     if (this.maxLength) {
@@ -155,7 +167,7 @@ class TaskListen extends Task {
     }
 
     /* support bi-directional audio */
-    if (!this.disableBidirectionalAudio) {
+    if (this.bidirectionalAudio.enabled) {
       ep.addCustomEventListener(ListenEvents.PlayAudio, this._onPlayAudio.bind(this, ep));
     }
     ep.addCustomEventListener(ListenEvents.KillAudio, this._onKillAudio.bind(this, ep));

lib/tasks/make_task.js

@@ -14,6 +14,9 @@ function makeTask(logger, obj, parent) {
   }
   validateVerb(name, data, logger);
   switch (name) {
+    case TaskName.Answer:
+      const TaskAnswer = require('./answer');
+      return new TaskAnswer(logger, data, parent);
     case TaskName.SipDecline:
       const TaskSipDecline = require('./sip_decline');
       return new TaskSipDecline(logger, data, parent);
@@ -41,6 +44,9 @@ function makeTask(logger, obj, parent) {
     case TaskName.Dtmf:
       const TaskDtmf = require('./dtmf');
       return new TaskDtmf(logger, data, parent);
+    case TaskName.Dub:
+      const TaskDub = require('./dub');
+      return new TaskDub(logger, data, parent);
     case TaskName.Enqueue:
       const TaskEnqueue = require('./enqueue');
       return new TaskEnqueue(logger, data, parent);

lib/tasks/rest_dial.js

@@ -17,6 +17,7 @@ class TaskRestDial extends Task {
     this.call_hook = this.data.call_hook;
     this.timeout = this.data.timeout || 60;
     this.sipRequestWithinDialogHook = this.data.sipRequestWithinDialogHook;
+    this.referHook = this.data.referHook;
 
     this.on('connect', this._onConnect.bind(this));
     this.on('callStatus', this._onCallStatus.bind(this));
@@ -64,6 +65,7 @@ class TaskRestDial extends Task {
     this.canCancel = false;
     const cs = this.callSession;
     cs.setDialog(dlg);
+    cs.referHook = this.referHook;
     this.logger.debug('TaskRestDial:_onConnect - call connected');
     if (this.sipRequestWithinDialogHook) this._initSipRequestWithinDialogHandler(cs, dlg);
     try {

lib/tasks/say.js

@@ -1,4 +1,4 @@
-const Task = require('./task');
+const TtsTask = require('./tts-task');
 const {TaskName, TaskPreconditions} = require('../utils/constants');
 const pollySSMLSplit = require('polly-ssml-split');
 
@@ -23,9 +23,15 @@ const breakLengthyTextIfNeeded = (logger,  text) => {
   }
 };
 
-class TaskSay extends Task {
+const parseTextFromSayString = (text) => {
+  const closingBraceIndex = text.indexOf('}');
+  if (closingBraceIndex === -1) return text;
+  return text.slice(closingBraceIndex + 1);
+};
+
+class TaskSay extends TtsTask {
   constructor(logger, opts, parentTask) {
-    super(logger, opts);
+    super(logger, opts, parentTask);
     this.preconditions = TaskPreconditions.Endpoint;
 
     this.text = (Array.isArray(this.data.text) ? this.data.text : [this.data.text])
@@ -33,10 +39,6 @@ class TaskSay extends Task {
       .flat();
 
     this.loop = this.data.loop || 1;
-    this.earlyMedia = this.data.earlyMedia === true || (parentTask && parentTask.earlyMedia);
-    this.synthesizer = this.data.synthesizer || {};
-    this.disableTtsCache = this.data.disableTtsCache;
-    this.options = this.synthesizer.options || {};
     this.isHandledByPrimaryProvider = true;
   }
 
@@ -59,12 +61,12 @@ class TaskSay extends Task {
     }
   }
 
-  async _synthesizeWithSpecificVendor(cs, ep, {vendor, language, voice, label}) {
-    const {srf} = cs;
+  async _synthesizeWithSpecificVendor(cs, ep, {vendor, language, voice, label, preCache = false}) {
+    const {srf, accountSid:account_sid} = cs;
     const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, srf);
     const {writeAlerts, AlertType, stats} = srf.locals;
     const {synthAudio} = srf.locals.dbHelpers;
-    const engine = this.synthesizer.engine || 'standard';
+    const engine = this.synthesizer.engine || cs.synthesizer?.engine || 'neural';
     const salt = cs.callSid;
 
     let credentials = cs.getSpeechCredentials(vendor, 'tts', label);
@@ -76,6 +78,8 @@ class TaskSay extends Task {
         voice = arr[1];
         model = arr[2];
       }
+    } else if (vendor === 'deepgram') {
+      model = voice;
     }
 
     /* allow for microsoft custom region voice and api_key to be specified as an override */
@@ -95,18 +99,23 @@ class TaskSay extends Task {
       voice = this.options.voice_id || voice;
     }
 
-    this.logger.info({vendor, language, voice, model}, 'TaskSay:exec');
+    ep.set({
+      tts_engine: vendor.startsWith('custom:') ? 'custom' : vendor,
+      tts_voice: voice,
+      cache_speech_handles: !cs.currentTtsVendor || cs.currentTtsVendor === vendor ? 1 : 0,
+    }).catch((err) => this.logger.info({err}, 'Error setting tts_engine on endpoint'));
+    // set the current vendor on the call session
+    // If vendor is changed from the previous one, then reset the cache_speech_handles flag
+    cs.currentTtsVendor = vendor;
+
+    if (!preCache && !this._disableTracing) this.logger.info({vendor, language, voice, model}, 'TaskSay:exec');
     try {
       if (!credentials) {
         writeAlerts({
-          account_sid: cs.accountSid,
+          account_sid,
           alert_type: AlertType.TTS_NOT_PROVISIONED,
           vendor
         }).catch((err) => this.logger.info({err}, 'Error generating alert for no tts'));
-        this.notifyError({
-          msg: 'TTS error',
-          details:`No speech credentials provisioned for selected vendor ${vendor}`
-        });
         throw new Error('no provisioned speech credentials for TTS');
       }
       // synthesize all of the text elements
@@ -118,14 +127,17 @@ class TaskSay extends Task {
         if (text.startsWith('silence_stream://')) return text;
 
         /* otel: trace time for tts */
-        const {span} = this.startChildSpan('tts-generation', {
-          'tts.vendor': vendor,
-          'tts.language': language,
-          'tts.voice': voice
-        });
+        if (!preCache && !this._disableTracing)  {
+          const {span} = this.startChildSpan('tts-generation', {
+            'tts.vendor': vendor,
+            'tts.language': language,
+            'tts.voice': voice
+          });
+          this.otelSpan = span;
+        }
         try {
           const {filePath, servedFromCache, rtt} = await synthAudio(stats, {
-            account_sid: cs.accountSid,
+            account_sid,
             text,
             vendor,
             language,
@@ -135,37 +147,46 @@ class TaskSay extends Task {
             salt,
             credentials,
             options: this.options,
-            disableTtsCache : this.disableTtsCache
+            disableTtsCache : this.disableTtsCache,
+            preCache
           });
-          this.logger.debug(`file ${filePath}, served from cache ${servedFromCache}`);
-          if (filePath) cs.trackTmpFile(filePath);
-          if (!servedFromCache && !lastUpdated) {
-            lastUpdated = true;
-            updateSpeechCredentialLastUsed(credentials.speech_credential_sid)
-              .catch(() => {/*already logged error */});
+          if (!filePath.startsWith('say:')) {
+            this.logger.debug(`Say: file ${filePath}, served from cache ${servedFromCache}`);
+            if (filePath) cs.trackTmpFile(filePath);
+            if (this.otelSpan) {
+              this.otelSpan.setAttributes({'tts.cached': servedFromCache});
+              this.otelSpan.end();
+              this.otelSpan = null;
+            }
+            if (!servedFromCache && !lastUpdated) {
+              lastUpdated = true;
+              updateSpeechCredentialLastUsed(credentials.speech_credential_sid).catch(() => {/* logged error */});
+            }
+            if (!servedFromCache && rtt && !preCache  && !this._disableTracing) {
+              this.notifyStatus({
+                event: 'synthesized-audio',
+                vendor,
+                language,
+                characters: text.length,
+                elapsedTime: rtt
+              });
+            }
           }
-          span.setAttributes({'tts.cached': servedFromCache});
-          span.end();
-          if (!servedFromCache && rtt) {
-            this.notifyStatus({
-              event: 'synthesized-audio',
-              vendor,
-              language,
-              characters: text.length,
-              elapsedTime: rtt
-            });
+          else {
+            this.logger.debug('Say: a streaming tts api will be used');
+            const modifiedPath = filePath.replace('say:{', `say:{session-uuid=${ep.uuid},`);
+            return modifiedPath;
           }
           return filePath;
         } catch (err) {
           this.logger.info({err}, 'Error synthesizing tts');
-          span.end();
+          if (this.otelSpan) this.otelSpan.end();
           writeAlerts({
             account_sid: cs.accountSid,
             alert_type: AlertType.TTS_FAILURE,
             vendor,
             detail: err.message
           }).catch((err) => this.logger.info({err}, 'Error generating alert for tts failure'));
-          this.notifyError({msg: 'TTS error', details: err.message || err});
           throw err;
         }
       };
@@ -180,21 +201,27 @@ class TaskSay extends Task {
   }
 
   async exec(cs, {ep}) {
+    const {srf, accountSid:account_sid} = cs;
+    const {writeAlerts, AlertType} = srf.locals;
+    const {addFileToCache} = srf.locals.dbHelpers;
+    const engine = this.synthesizer.engine || cs.synthesizer?.engine || 'neural';
+
     await super.exec(cs);
     this.ep = ep;
 
-    const vendor = this.synthesizer.vendor && this.synthesizer.vendor !== 'default' ?
+    let vendor = this.synthesizer.vendor && this.synthesizer.vendor !== 'default' ?
       this.synthesizer.vendor :
       cs.speechSynthesisVendor;
-    const language = this.synthesizer.language && this.synthesizer.language !== 'default' ?
+    let language = this.synthesizer.language && this.synthesizer.language !== 'default' ?
       this.synthesizer.language :
       cs.speechSynthesisLanguage ;
-    const voice =  this.synthesizer.voice && this.synthesizer.voice !== 'default' ?
+    let voice =  this.synthesizer.voice && this.synthesizer.voice !== 'default' ?
       this.synthesizer.voice :
       cs.speechSynthesisVoice;
-    const label = this.synthesizer.label && this.synthesizer.label !== 'default' ?
-      this.synthesizer.label :
-      cs.speechSynthesisLabel;
+    // label can be null/empty in synthesizer config, just use application level label if it's default
+    let label = this.synthesizer.label === 'default' ?
+      cs.speechSynthesisLabel :
+      this.synthesizer.label;
 
     const fallbackVendor = this.synthesizer.fallbackVendor && this.synthesizer.fallbackVendor !== 'default' ?
       this.synthesizer.fallbackVendor :
@@ -205,16 +232,24 @@ class TaskSay extends Task {
     const fallbackVoice =  this.synthesizer.fallbackVoice && this.synthesizer.fallbackVoice !== 'default' ?
       this.synthesizer.fallbackVoice :
       cs.fallbackSpeechSynthesisVoice;
-    const fallbackLabel = this.synthesizer.fallbackLabel && this.synthesizer.fallbackLabel !== 'default' ?
-      this.synthesizer.fallbackLabel :
-      cs.fallbackSpeechSynthesisLabel;
+    // label can be null/empty in synthesizer config, just use application level label if it's default
+    const fallbackLabel = this.synthesizer.fallbackLabel === 'default' ?
+      cs.fallbackSpeechSynthesisLabel :
+      this.synthesizer.fallbackLabel;
 
-    let filepath;
-    try {
-      filepath = await this._synthesizeWithSpecificVendor(cs, ep, {vendor, language, voice, label});
-    } catch (error) {
-      if (fallbackVendor && this.isHandledByPrimaryProvider) {
+    if (cs.hasFallbackTts) {
+      vendor = fallbackVendor;
+      language = fallbackLanguage;
+      voice = fallbackVoice;
+      label = fallbackLabel;
+    }
+
+    const startFallback = async(error) => {
+      if (fallbackVendor && this.isHandledByPrimaryProvider && !cs.hasFallbackTts) {
+        this.notifyError(
+          { msg: 'TTS error', details:`TTS vendor ${vendor} error: ${error}`, failover: 'in progress'});
         this.isHandledByPrimaryProvider = false;
+        cs.hasFallbackTts = true;
         this.logger.info(`Synthesize error, fallback to ${fallbackVendor}`);
         filepath = await this._synthesizeWithSpecificVendor(cs, ep,
           {
@@ -224,22 +259,107 @@ class TaskSay extends Task {
             label: fallbackLabel
           });
       } else {
+        this.notifyError(
+          { msg: 'TTS error', details:`TTS vendor ${vendor} error: ${error}`, failover: 'not available'});
         throw error;
       }
+    };
+    let filepath;
+    try {
+      filepath = await this._synthesizeWithSpecificVendor(cs, ep, {vendor, language, voice, label});
+    } catch (error) {
+      await startFallback(error);
     }
     this.notifyStatus({event: 'start-playback'});
 
-    while (!this.killed && (this.loop === 'forever' || this.loop--) && this.ep?.connected) {
+    while (!this.killed && (this.loop === 'forever' || this.loop--) && ep?.connected) {
       let segment = 0;
       while (!this.killed && segment < filepath.length) {
         if (cs.isInConference) {
           const {memberId, confName, confUuid} = cs;
-          await this.playToConfMember(this.ep, memberId, confName, confUuid, filepath[segment]);
+          await this.playToConfMember(ep, memberId, confName, confUuid, filepath[segment]);
         }
         else {
-          this.logger.debug(`Say:exec sending command to play file ${filepath[segment]}`);
-          await ep.play(filepath[segment]);
-          this.logger.debug(`Say:exec completed play file ${filepath[segment]}`);
+          let tts_cache_filename;
+          if (filepath[segment].startsWith('say:{')) {
+            const arr = /^say:\{.*\}\s*(.*)$/.exec(filepath[segment]);
+            if (arr) this.logger.debug(`Say:exec sending streaming tts request: ${arr[1].substring(0, 64)}..`);
+          }
+          else this.logger.debug(`Say:exec sending  ${filepath[segment].substring(0, 64)}`);
+          ep.once('playback-start', (evt) => {
+            this.logger.debug({evt}, 'Say got playback-start');
+            if (this.otelSpan) {
+              this._addStreamingTtsAttributes(this.otelSpan, evt);
+              this.otelSpan.end();
+              this.otelSpan = null;
+              if (evt.variable_tts_cache_filename) {
+                tts_cache_filename = evt.variable_tts_cache_filename;
+                cs.trackTmpFile(evt.variable_tts_cache_filename);
+              }
+              else {
+                this.logger.info('No tts_cache_filename in playback-start event');
+              }
+            }
+          });
+          ep.once('playback-stop', (evt) => {
+            if (!tts_cache_filename || evt.variable_tts_cache_filename !== tts_cache_filename) {
+              this.logger.info({evt}, 'Say: discarding playback-stop from other say verb');
+            }
+            else {
+              this.logger.debug({evt}, 'Say got playback-stop');
+              if (evt.variable_tts_error) {
+                writeAlerts({
+                  account_sid,
+                  alert_type: AlertType.TTS_FAILURE,
+                  vendor,
+                  detail: evt.variable_tts_error
+                }).catch((err) => this.logger.info({err}, 'Error generating alert for no tts'));
+              }
+              if (evt.variable_tts_cache_filename && !this.killed) {
+                const text = parseTextFromSayString(this.text[segment]);
+                addFileToCache(evt.variable_tts_cache_filename, {
+                  account_sid,
+                  vendor,
+                  language,
+                  voice,
+                  engine,
+                  text
+                }).catch((err) => this.logger.info({err}, 'Error adding file to cache'));
+              }
+            }
+            if (this._playResolve) {
+              evt.variable_tts_error ? this._playReject(new Error(evt.variable_tts_error)) : this._playResolve();
+            }
+          });
+          // wait for playback-stop event received to confirm if the playback is successful
+          this._playPromise = new Promise((resolve, reject) => {
+            this._playResolve = resolve;
+            this._playReject = reject;
+          });
+          const r = await ep.play(filepath[segment]);
+          this.logger.debug({r}, 'Say:exec play result');
+          try {
+            // wait for playback-stop event received to confirm if the playback is successful
+            await this._playPromise;
+          } catch (err) {
+            try {
+              await startFallback(err);
+              continue;
+            } catch (err) {
+              this.logger.info({err}, 'Error waiting for playback-stop event');
+            }
+          } finally {
+            this._playPromise = null;
+            this._playResolve = null;
+            this._playReject = null;
+          }
+          if (filepath[segment].startsWith('say:{')) {
+            const arr = /^say:\{.*\}\s*(.*)$/.exec(filepath[segment]);
+            if (arr) this.logger.debug(`Say:exec complete playing streaming tts request: ${arr[1].substring(0, 64)}..`);
+          } else {
+            // This log will print spech credentials in say command for tts stream mode
+            this.logger.debug(`Say:exec completed play file ${filepath[segment]}`);
+          }
         }
         segment++;
       }
@@ -249,7 +369,7 @@ class TaskSay extends Task {
 
   async kill(cs) {
     super.kill(cs);
-    if (this.ep.connected) {
+    if (this.ep?.connected) {
       this.logger.debug('TaskSay:kill - killing audio');
       if (cs.isInConference) {
         const {memberId, confName} = cs;
@@ -259,8 +379,78 @@ class TaskSay extends Task {
         this.notifyStatus({event: 'kill-playback'});
         this.ep.api('uuid_break', this.ep.uuid);
       }
+      this.ep.removeAllListeners('playback-start');
+      this.ep.removeAllListeners('playback-stop');
+      // if we are waiting for playback-stop event, resolve the promise
+      if (this._playResolve) {
+        this._playResolve();
+        this._playResolve = null;
+      }
     }
   }
+
+  _addStreamingTtsAttributes(span, evt) {
+    const attrs = {'tts.cached': false};
+    for (const [key, value] of Object.entries(evt)) {
+      if (key.startsWith('variable_tts_')) {
+        let newKey = key.substring('variable_tts_'.length)
+          .replace('whisper_', 'whisper.')
+          .replace('deepgram_', 'deepgram.')
+          .replace('playht_', 'playht.')
+          .replace('rimelabs_', 'rimelabs.')
+          .replace('verbio_', 'verbio.')
+          .replace('elevenlabs_', 'elevenlabs.');
+        if (spanMapping[newKey]) newKey = spanMapping[newKey];
+        attrs[newKey] = value;
+      }
+    }
+    delete attrs['cache_filename']; //no value in adding this to the span
+    span.setAttributes(attrs);
+  }
 }
 
+const spanMapping = {
+  // IMPORTANT!!! JAMBONZ WEBAPP WILL SHOW TEXT PERFECTLY IF THE SPAN NAME IS SMALLER OR EQUAL 25 CHARACTERS.
+  // EX: whisper.ratelim_reqs has length 20 <= 25 which is perfect
+  // Elevenlabs
+  'elevenlabs.reported_latency_ms': 'elevenlabs.latency_ms',
+  'elevenlabs.request_id': 'elevenlabs.req_id',
+  'elevenlabs.history_item_id': 'elevenlabs.item_id',
+  'elevenlabs.optimize_streaming_latency': 'elevenlabs.optimization',
+  'elevenlabs.name_lookup_time_ms': 'name_lookup_ms',
+  'elevenlabs.connect_time_ms': 'connect_ms',
+  'elevenlabs.final_response_time_ms': 'final_response_ms',
+  // Whisper
+  'whisper.reported_latency_ms': 'whisper.latency_ms',
+  'whisper.request_id': 'whisper.req_id',
+  'whisper.reported_organization': 'whisper.organization',
+  'whisper.reported_ratelimit_requests': 'whisper.ratelimit',
+  'whisper.reported_ratelimit_remaining_requests': 'whisper.ratelimit_remain',
+  'whisper.reported_ratelimit_reset_requests': 'whisper.ratelimit_reset',
+  'whisper.name_lookup_time_ms': 'name_lookup_ms',
+  'whisper.connect_time_ms': 'connect_ms',
+  'whisper.final_response_time_ms': 'final_response_ms',
+  // Deepgram
+  'deepgram.request_id': 'deepgram.req_id',
+  'deepgram.reported_model_name': 'deepgram.model_name',
+  'deepgram.reported_model_uuid': 'deepgram.model_uuid',
+  'deepgram.reported_char_count': 'deepgram.char_count',
+  'deepgram.name_lookup_time_ms': 'name_lookup_ms',
+  'deepgram.connect_time_ms': 'connect_ms',
+  'deepgram.final_response_time_ms': 'final_response_ms',
+  // Playht
+  'playht.request_id': 'playht.req_id',
+  'playht.name_lookup_time_ms': 'name_lookup_ms',
+  'playht.connect_time_ms': 'connect_ms',
+  'playht.final_response_time_ms': 'final_response_ms',
+  // Rimelabs
+  'rimelabs.name_lookup_time_ms': 'name_lookup_ms',
+  'rimelabs.connect_time_ms': 'connect_ms',
+  'rimelabs.final_response_time_ms': 'final_response_ms',
+  // verbio
+  'verbio.name_lookup_time_ms': 'name_lookup_ms',
+  'verbio.connect_time_ms': 'connect_ms',
+  'verbio.final_response_time_ms': 'final_response_ms',
+};
+
 module.exports = TaskSay;

lib/tasks/stt-task.js

@@ -14,17 +14,15 @@ class SttTask extends Task {
     const {
       setChannelVarsForStt,
       normalizeTranscription,
-      removeSpeechListeners,
       setSpeechCredentialsAtRuntime,
       compileSonioxTranscripts,
       consolidateTranscripts
     } = require('../utils/transcription-utils')(logger);
     this.setChannelVarsForStt = setChannelVarsForStt;
     this.normalizeTranscription = normalizeTranscription;
-    this.removeSpeechListeners = removeSpeechListeners;
     this.compileSonioxTranscripts = compileSonioxTranscripts;
     this.consolidateTranscripts = consolidateTranscripts;
-
+    this.eventHandlers = [];
     this.isHandledByPrimaryProvider = true;
     if (this.data.recognizer) {
       const recognizer = this.data.recognizer;
@@ -35,7 +33,8 @@ class SttTask extends Task {
       //fallback
       this.fallbackVendor = recognizer.fallbackVendor || 'default';
       this.fallbackLanguage = recognizer.fallbackLanguage || 'default';
-      this.fallbackLabel = recognizer.fallbackLabel || 'default';
+      // label can be empty and should not have default value.
+      this.fallbackLabel = recognizer.fallbackLabel;
 
       /* let credentials be supplied in the recognizer object at runtime */
       this.sttCredentials = setSpeechCredentialsAtRuntime(recognizer);
@@ -49,6 +48,8 @@ class SttTask extends Task {
 
     /* buffer for soniox transcripts */
     this._sonioxTranscripts = [];
+    /*bug name prefix */
+    this.bugname_prefix = '';
 
   }
 
@@ -56,6 +57,23 @@ class SttTask extends Task {
     super.exec(cs);
     this.ep = ep;
     this.ep2 = ep2;
+
+    // use session preferences if we don't have specific verb-level settings.
+    if (cs.recognizer) {
+      for (const k in cs.recognizer) {
+        const newValue = this.data.recognizer && this.data.recognizer[k] !== undefined ?
+          this.data.recognizer[k] :
+          cs.recognizer[k];
+
+        if (Array.isArray(newValue)) {
+          this.data.recognizer[k] = [...(this.data.recognizer[k] || []), ...cs.recognizer[k]];
+        } else if (typeof newValue === 'object' && newValue !== null) {
+          this.data.recognizer[k] = { ...(this.data.recognizer[k] || {}), ...cs.recognizer[k] };
+        } else {
+          this.data.recognizer[k] = newValue;
+        }
+      }
+    }
     if ('default' === this.vendor || !this.vendor) {
       this.vendor = cs.speechRecognizerVendor;
       if (this.data.recognizer) this.data.recognizer.vendor = this.vendor;
@@ -64,7 +82,8 @@ class SttTask extends Task {
       this.language = cs.speechRecognizerLanguage;
       if (this.data.recognizer) this.data.recognizer.language = this.language;
     }
-    if ('default' === this.label || !this.label) {
+    // label can be empty, should not assign application level label
+    if ('default' === this.label) {
       this.label = cs.speechRecognizerLabel;
       if (this.data.recognizer) this.data.recognizer.label = this.label;
     }
@@ -77,10 +96,18 @@ class SttTask extends Task {
       this.fallbackLanguage = cs.fallbackSpeechRecognizerLanguage;
       if (this.data.recognizer) this.data.recognizer.fallbackLanguage = this.fallbackLanguage;
     }
-    if ('default' === this.fallbackLabel || !this.fallbackLabel) {
+    // label can be empty, should not assign application level label
+    if ('default' === this.fallbackLabel) {
       this.fallbackLabel = cs.fallbackSpeechRecognizerLabel;
       if (this.data.recognizer) this.data.recognizer.fallbackLabel = this.fallbackLabel;
     }
+    // If call is already fallback to 2nd ASR vendor
+    // use that.
+    if (cs.hasFallbackAsr) {
+      this.vendor = this.fallbackVendor;
+      this.language = this.fallbackLanguage;
+      this.label = this.fallbackLabel;
+    }
     if (!this.data.recognizer.vendor) {
       this.data.recognizer.vendor = this.vendor;
     }
@@ -89,30 +116,28 @@ class SttTask extends Task {
       this.data.recognizer.model = cs.speechRecognizerLanguage;
     }
 
-    if (cs.recognizer) {
-      for (const k in cs.recognizer) {
-        if (Array.isArray(this.data.recognizer[k]) ||
-        Array.isArray(cs.recognizer[k]) ||
-        typeof this.data.recognizer[k] === 'object' ||
-        typeof cs.recognizer[k] === 'object'
-        ) {
-          this.data.recognizer[k] = {
-            ...this.data.recognizer[k],
-            ...cs.recognizer[k]
-          };
-        }  else {
-          this.data.recognizer[k] = cs.recognizer[k] || this.data.recognizer[k];
-        }
-      }
-    }
-
-    if (!this.sttCredentials) {
+    if (
+      // not gather task, such as transcribe
+      (!this.input ||
+      // gather task with speech
+        this.input.includes('speech')) &&
+      !this.sttCredentials) {
       try {
         this.sttCredentials = await this._initSpeechCredentials(this.cs, this.vendor, this.label);
       } catch (error) {
-        if (this.fallbackVendor && this.isHandledByPrimaryProvider) {
-          await this._fallback();
+        if (this.canFallback) {
+          this.notifyError(
+            {
+              msg: 'ASR error', details:`Invalid vendor ${this.vendor}, Error: ${error}`,
+              failover: 'in progress'
+            });
+          await this._initFallback();
         } else {
+          this.notifyError(
+            {
+              msg: 'ASR error', details:`Invalid vendor ${this.vendor}, Error: ${error}`,
+              failover: 'not available'
+            });
           throw error;
         }
       }
@@ -123,10 +148,28 @@ class SttTask extends Task {
       this.notifyError({ msg: 'ASR error', details:'Cobalt requires a model to be specified'});
       throw new Error('Cobalt requires a model to be specified');
     }
+
+    if (cs.hasAltLanguages) {
+      this.data.recognizer.altLanguages = this.data.recognizer.altLanguages.concat(cs.altLanguages);
+      this.logger.debug({altLanguages: this.altLanguages},
+        'STT:exec - applying altLanguages');
+    }
+    if (cs.hasGlobalSttPunctuation && !this.data.recognizer.punctuation) {
+      this.data.recognizer.punctuation = cs.globalSttPunctuation;
+    }
+  }
+
+  addCustomEventListener(ep, event, handler) {
+    this.eventHandlers.push({ep, event, handler});
+    ep.addCustomEventListener(event, handler);
+  }
+
+  removeCustomEventListeners() {
+    this.eventHandlers.forEach((h) => h.ep.removeCustomEventListener(h.event, h.handler));
   }
 
   async _initSpeechCredentials(cs, vendor, label) {
-    const {getNuanceAccessToken, getIbmAccessToken} = cs.srf.locals.dbHelpers;
+    const {getNuanceAccessToken, getIbmAccessToken, getAwsAuthToken, getVerbioAccessToken} = cs.srf.locals.dbHelpers;
     let credentials = cs.getSpeechCredentials(vendor, 'stt', label);
 
     if (!credentials) {
@@ -137,11 +180,6 @@ class SttTask extends Task {
         alert_type: AlertType.STT_NOT_PROVISIONED,
         vendor
       }).catch((err) => this.logger.info({err}, 'Error generating alert for no stt'));
-      // Notify application that STT vender is wrong.
-      this.notifyError({
-        msg: 'ASR error',
-        details: `No speech-to-text service credentials for ${vendor} have been configured`
-      });
       this.notifyTaskDone();
       throw new Error(`No speech-to-text service credentials for ${vendor} have been configured`);
     }
@@ -159,13 +197,33 @@ class SttTask extends Task {
       const {access_token, servedFromCache} = await getIbmAccessToken(stt_api_key);
       this.logger.debug({stt_api_key}, `got ibm access token ${servedFromCache ? 'from cache' : ''}`);
       credentials = {...credentials, access_token, stt_region};
+    } else if (['aws', 'polly'].includes(vendor) && credentials.roleArn) {
+      /* get aws access token */
+      const {roleArn, region} = credentials;
+      const {accessKeyId, secretAccessKey, sessionToken, servedFromCache} =
+        await getAwsAuthToken({
+          region,
+          roleArn
+        });
+      this.logger.debug({roleArn}, `got aws access token ${servedFromCache ? 'from cache' : ''}`);
+      credentials = {...credentials, accessKeyId, secretAccessKey, sessionToken};
+    } else if (vendor === 'verbio' && credentials.client_id && credentials.client_secret) {
+      const {access_token, servedFromCache} = await getVerbioAccessToken(credentials);
+      this.logger.debug({client_id: credentials.client_id},
+        `got verbio access token ${servedFromCache ? 'from cache' : ''}`);
+      credentials.access_token = access_token;
     }
     return credentials;
   }
 
-  async _fallback() {
+  get canFallback() {
+    return this.fallbackVendor && this.isHandledByPrimaryProvider && !this.cs.hasFallbackAsr;
+  }
+
+  async _initFallback() {
     assert(this.fallbackVendor, 'fallback failed without fallbackVendor configuration');
     this.isHandledByPrimaryProvider = false;
+    this.cs.hasFallbackAsr = true;
     this.logger.info(`Failed to use primary STT provider, fallback to ${this.fallbackVendor}`);
     this.vendor = this.fallbackVendor;
     this.language = this.fallbackLanguage;
@@ -174,6 +232,8 @@ class SttTask extends Task {
     this.data.recognizer.language = this.language;
     this.data.recognizer.label = this.label;
     this.sttCredentials = await this._initSpeechCredentials(this.cs, this.vendor, this.label);
+    // cleanup previous listener from previous vendor
+    this.removeCustomEventListeners();
   }
 
   async compileHintsForCobalt(ep, hostport, model, token, hints) {
@@ -217,6 +277,20 @@ class SttTask extends Task {
   _doContinuousAsrWithDeepgram(asrTimeout) {
     /* deepgram has an utterance_end_ms property that simplifies things */
     assert(this.vendor === 'deepgram');
+    if (asrTimeout < 1000) {
+      this.notifyError({
+        msg: 'ASR error',
+        details:`asrTimeout ${asrTimeout} is too short for deepgram; setting it to 1000ms`
+      });
+      asrTimeout = 1000;
+    }
+    else if (asrTimeout > 5000) {
+      this.notifyError({
+        msg: 'ASR error',
+        details:`asrTimeout ${asrTimeout} is too long for deepgram; setting it to 5000ms`
+      });
+      asrTimeout = 5000;
+    }
     this.logger.debug(`_doContinuousAsrWithDeepgram - setting utterance_end_ms to ${asrTimeout}`);
     const dgOptions = this.data.recognizer.deepgramOptions = this.data.recognizer.deepgramOptions || {};
     dgOptions.utteranceEndMs = dgOptions.utteranceEndMs || asrTimeout;
@@ -236,7 +310,6 @@ class SttTask extends Task {
       detail: evt.error,
       vendor: this.vendor,
     }).catch((err) => this.logger.info({err}, `Error generating alert for ${this.vendor} connection failure`));
-    this.notifyError({msg: 'ASR error', details:`Failed connecting to speech vendor ${this.vendor}: ${evt.error}`});
   }
 
   _onVendorConnectFailure(cs, _ep, evt) {
@@ -249,7 +322,6 @@ class SttTask extends Task {
       message: `Failed connecting to ${this.vendor} speech recognizer: ${reason}`,
       vendor: this.vendor,
     }).catch((err) => this.logger.info({err}, `Error generating alert for ${this.vendor} connection failure`));
-    this.notifyError({msg: 'ASR error', details:`Failed connecting to speech vendor ${this.vendor}: ${reason}`});
   }
 }
 

lib/tasks/task.js

@@ -45,6 +45,10 @@ class Task extends Emitter {
     return this.name;
   }
 
+  set disableTracing(val) {
+    this._disableTracing = val;
+  }
+
   toJSON() {
     return this.data;
   }
@@ -160,15 +164,33 @@ class Task extends Emitter {
       const httpHeaders = b3 && {b3};
       span.setAttributes({'http.body': JSON.stringify(params)});
       try {
+        if (this.id) params.verb_id = this.id;
         const json = await this.cs.requestor.request(type, this.actionHook, params, httpHeaders);
         span.setAttributes({'http.statusCode': 200});
-        span.end();
+        const isWsConnection = this.cs.requestor instanceof WsRequestor;
+        if (!isWsConnection || (expectResponse && json && Array.isArray(json) && json.length)) {
+          span.end();
+        } else {
+          /** we use this span to measure application response latency,
+           * and with websocket connections we generally get the application's response
+           * in a subsequent message from the far end, so we terminate the span when the
+           * first new set of verbs arrive after sending a transcript
+           * */
+          this.emit('VerbHookSpanWaitForEnd', {span});
+
+          // If actionHook delay action is configured, and ws application have not responded yet any verb for actionHook
+          // We have to transfer the task to call-session to await on next ws command verbs, and also run action Hook
+          // delay actions
+          //if (this.hookDelayActionOpts) {
+          //  this.emit('ActionHookDelayActionOptions', this.hookDelayActionOpts);
+          //}
+        }
         if (expectResponse && json && Array.isArray(json)) {
           const makeTask = require('./make_task');
           const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));
           if (tasks && tasks.length > 0) {
-            this.logger.info({tasks: tasks}, `${this.name} replacing application with ${tasks.length} tasks`);
             this.callSession.replaceApplication(tasks);
+            return true;
           }
         }
       } catch (err) {
@@ -176,6 +198,7 @@ class Task extends Emitter {
         span.end();
         throw err;
       }
+      return false;
     }
   }
 
@@ -255,6 +278,7 @@ class Task extends Emitter {
     delete obj.requestor;
     delete obj.notifier;
     obj.tasks =  cs.getRemainingTaskData();
+    obj.callInfo = cs.callInfo.toJSON();
     if (opts && obj.tasks.length > 0) {
       const key = Object.keys(obj.tasks[0])[0];
       Object.assign(obj.tasks[0][key], {_: opts});

lib/tasks/transcribe.js

@@ -31,21 +31,59 @@ class TaskTranscribe extends SttTask {
       this.separateRecognitionPerChannel = this.data.recognizer.separateRecognitionPerChannel;
     }
 
+    /* for nested transcribe in dial, unless the app explicitly says so we want to transcribe both legs */
+    if (this.parentTask?.name === TaskName.Dial) {
+      if (this.data.channel === 1 || this.data.channel === 2) {
+        /* transcribe only the channel specified */
+        this.separateRecognitionPerChannel = false;
+        this.channel = this.data.channel;
+        logger.debug(`TaskTranscribe: transcribing only channel ${this.channel} in the Dial verb`);
+      }
+      else if (this.separateRecognitionPerChannel !== false) {
+        this.separateRecognitionPerChannel = true;
+      }
+      else {
+        this.channel = 1;
+      }
+    }
+    else {
+      this.channel = 1;
+    }
+
     this.childSpan = [null, null];
 
-    // Continuos asr timeout
+    // Continuous asr timeout
     this.asrTimeout = typeof this.data.recognizer.asrTimeout === 'number' ? this.data.recognizer.asrTimeout * 1000 : 0;
     if (this.asrTimeout > 0) {
       this.isContinuousAsr = true;
     }
     /* buffer speech for continuous asr */
-    this._bufferedTranscripts = [];
+    this._bufferedTranscripts = [ [], [] ];  // for channel 1 and 2
+    this.bugname_prefix = 'transcribe_';
+    this.paused = false;
   }
 
   get name() { return TaskName.Transcribe; }
 
+  get transcribing1() {
+    return this.channel === 1 || this.separateRecognitionPerChannel;
+  }
+
+  get transcribing2() {
+    return this.channel === 2 || this.separateRecognitionPerChannel && this.ep2;
+  }
+
   async exec(cs, {ep, ep2}) {
     await super.exec(cs, {ep, ep2});
+
+    if (this.data.recognizer.vendor === 'nuance') {
+      this.data.recognizer.nuanceOptions = {
+        // by default, nuance STT will recognize only 1st utterance.
+        // enable multiple allow nuance detact all utterances
+        utteranceDetectionMode: 'multiple',
+        ...this.data.recognizer.nuanceOptions
+      };
+    }
     const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, cs.srf);
 
     if (cs.hasGlobalSttHints) {
@@ -55,41 +93,42 @@ class TaskTranscribe extends SttTask {
       this.logger.debug({hints: this.data.recognizer.hints, hintsBoost: this.data.recognizer.hintsBoost},
         'Transcribe:exec - applying global sttHints');
     }
-    if (cs.hasAltLanguages) {
-      this.data.recognizer.altLanguages = this.data.recognizer.altLanguages.concat(cs.altLanguages);
-      this.logger.debug({altLanguages: this.altLanguages},
-        'Transcribe:exec - applying altLanguages');
-    }
-    if (cs.hasGlobalSttPunctuation && !this.data.recognizer.punctuation) {
-      this.data.recognizer.punctuation = cs.globalSttPunctuation;
-    }
+
     try {
-      await this._startTranscribing(cs, ep, 1);
-      if (this.separateRecognitionPerChannel && ep2) {
+      if (this.transcribing1) {
+        await this._startTranscribing(cs, ep, 1);
+      }
+      if (this.transcribing2) {
         await this._startTranscribing(cs, ep2, 2);
       }
 
       updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid)
         .catch(() => {/*already logged error */});
-
-      await this.awaitTaskDone();
     } catch (err) {
-      this.logger.info(err, 'TaskTranscribe:exec - error');
-      this.parentTask && this.parentTask.emit('error', err);
+      if (!(await this._startFallback(cs, ep, {error: err}))) {
+        this.logger.info(err, 'TaskTranscribe:exec - error');
+        this.parentTask && this.parentTask.emit('error', err);
+        this.removeCustomEventListeners();
+        return;
+      }
     }
-    this.removeSpeechListeners(ep);
+    await this.awaitTaskDone();
+    this.removeCustomEventListeners();
   }
 
   async _stopTranscription() {
     let stopTranscription = false;
-    if (this.ep?.connected) {
+    if (this.transcribing1 && this.ep?.connected) {
       stopTranscription = true;
-      this.ep.stopTranscription({vendor: this.vendor})
+      this.ep.stopTranscription({
+        vendor: this.vendor,
+        bugname: this.bugname
+      })
         .catch((err) => this.logger.info(err, 'Error TaskTranscribe:kill'));
     }
-    if (this.separateRecognitionPerChannel && this.ep2 && this.ep2.connected) {
+    if (this.transcribing2 && this.ep2?.connected) {
       stopTranscription = true;
-      this.ep2.stopTranscription({vendor: this.vendor})
+      this.ep2.stopTranscription({vendor: this.vendor, bugname: this.bugname})
         .catch((err) => this.logger.info(err, 'Error TaskTranscribe:kill'));
     }
 
@@ -111,13 +150,13 @@ class TaskTranscribe extends SttTask {
       this.logger.info(`TaskTranscribe:updateTranscribe status ${status}`);
       switch (status) {
         case TranscribeStatus.Pause:
+          this.paused = true;
           await this._stopTranscription();
           break;
         case TranscribeStatus.Resume:
-          await this._startTranscribing(this.cs, this.ep, 1);
-          if (this.separateRecognitionPerChannel && this.ep2) {
-            await this._startTranscribing(this.cs, this.ep2, 2);
-          }
+          this.paused = false;
+          if (this.transcribing1) await this._startTranscribing(this.cs, this.ep, 1);
+          if (this.transcribing2) await this._startTranscribing(this.cs, this.ep2, 2);
           break;
       }
     }
@@ -132,61 +171,61 @@ class TaskTranscribe extends SttTask {
       if (this.isContinuousAsr) this._doContinuousAsrWithDeepgram(this.asrTimeout);
     }
 
-    const opts = this.setChannelVarsForStt(this, this.sttCredentials, this.data.recognizer);
+    const opts = this.setChannelVarsForStt(this, this.sttCredentials, this.language, this.data.recognizer);
     switch (this.vendor) {
       case 'google':
-        this.bugname = 'google_transcribe';
-        ep.addCustomEventListener(GoogleTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}google_transcribe`;
+        this.addCustomEventListener(ep, GoogleTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(GoogleTranscriptionEvents.NoAudioDetected,
+        this.addCustomEventListener(ep, GoogleTranscriptionEvents.NoAudioDetected,
           this._onNoAudio.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(GoogleTranscriptionEvents.MaxDurationExceeded,
+        this.addCustomEventListener(ep, GoogleTranscriptionEvents.MaxDurationExceeded,
           this._onMaxDurationExceeded.bind(this, cs, ep, channel));
         break;
 
       case 'aws':
       case 'polly':
-        this.bugname = 'aws_transcribe';
-        ep.addCustomEventListener(AwsTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}aws_transcribe`;
+        this.addCustomEventListener(ep, AwsTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(AwsTranscriptionEvents.NoAudioDetected,
+        this.addCustomEventListener(ep, AwsTranscriptionEvents.NoAudioDetected,
           this._onNoAudio.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(AwsTranscriptionEvents.MaxDurationExceeded,
+        this.addCustomEventListener(ep, AwsTranscriptionEvents.MaxDurationExceeded,
           this._onMaxDurationExceeded.bind(this, cs, ep, channel));
         break;
       case 'microsoft':
-        this.bugname = 'azure_transcribe';
-        ep.addCustomEventListener(AzureTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}azure_transcribe`;
+        this.addCustomEventListener(ep, AzureTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(AzureTranscriptionEvents.NoSpeechDetected,
-          this._onNoAudio.bind(this, cs, ep, channel));
+        //this.addCustomEventListener(ep, AzureTranscriptionEvents.NoSpeechDetected,
+        //  this._onNoAudio.bind(this, cs, ep, channel));
         break;
       case 'nuance':
-        this.bugname = 'nuance_transcribe';
-        ep.addCustomEventListener(NuanceTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}nuance_transcribe`;
+        this.addCustomEventListener(ep, NuanceTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
         break;
       case 'deepgram':
-        this.bugname = 'deepgram_transcribe';
-        ep.addCustomEventListener(DeepgramTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}deepgram_transcribe`;
+        this.addCustomEventListener(ep, DeepgramTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(DeepgramTranscriptionEvents.Connect,
+        this.addCustomEventListener(ep, DeepgramTranscriptionEvents.Connect,
           this._onVendorConnect.bind(this, cs, ep));
-        ep.addCustomEventListener(DeepgramTranscriptionEvents.ConnectFailure,
+        this.addCustomEventListener(ep, DeepgramTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep, channel));
 
         /* if app sets deepgramOptions.utteranceEndMs they essentially want continuous asr */
-        if (opts.DEEPGRAM_SPEECH_UTTERANCE_END_MS) this.isContinuousAsr = true;
+        //if (opts.DEEPGRAM_SPEECH_UTTERANCE_END_MS) this.isContinuousAsr = true;
 
         break;
       case 'soniox':
-        this.bugname = 'soniox_transcribe';
-        ep.addCustomEventListener(SonioxTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}soniox_transcribe`;
+        this.addCustomEventListener(ep, SonioxTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
         break;
       case 'cobalt':
-        this.bugname = 'cobalt_transcribe';
-        ep.addCustomEventListener(CobaltTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}cobalt_transcribe`;
+        this.addCustomEventListener(ep, CobaltTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
 
         /* cobalt doesnt have language, it has model, which is required */
@@ -215,38 +254,39 @@ class TaskTranscribe extends SttTask {
         break;
 
       case 'ibm':
-        this.bugname = 'ibm_transcribe';
-        ep.addCustomEventListener(IbmTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}ibm_transcribe`;
+        this.addCustomEventListener(ep, IbmTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(IbmTranscriptionEvents.Connect,
+        this.addCustomEventListener(ep, IbmTranscriptionEvents.Connect,
           this._onVendorConnect.bind(this, cs, ep));
-        ep.addCustomEventListener(IbmTranscriptionEvents.ConnectFailure,
+        this.addCustomEventListener(ep, IbmTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep, channel));
         break;
 
       case 'nvidia':
-        this.bugname = 'nvidia_transcribe';
-        ep.addCustomEventListener(NvidiaTranscriptionEvents.Transcription,
-          this._onTranscription.bind(this, cs, ep));
+        this.bugname = `${this.bugname_prefix}nvidia_transcribe`;
+        this.addCustomEventListener(ep, NvidiaTranscriptionEvents.Transcription,
+          this._onTranscription.bind(this, cs, ep, channel));
         break;
 
       case 'assemblyai':
-        this.bugname = 'assemblyai_transcribe';
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.Transcription,
+        this.bugname = `${this.bugname_prefix}assemblyai_transcribe`;
+        this.addCustomEventListener(ep, AssemblyAiTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.Error, this._onVendorError.bind(this, cs, ep));
-        ep.addCustomEventListener(AssemblyAiTranscriptionEvents.ConnectFailure,
+        this.addCustomEventListener(ep,
+          AssemblyAiTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
+        this.addCustomEventListener(ep, AssemblyAiTranscriptionEvents.Error, this._onVendorError.bind(this, cs, ep));
+        this.addCustomEventListener(ep, AssemblyAiTranscriptionEvents.ConnectFailure,
           this._onVendorConnectFailure.bind(this, cs, ep, channel));
         break;
 
       default:
         if (this.vendor.startsWith('custom:')) {
-          this.bugname = `${this.vendor}_transcribe`;
-          ep.addCustomEventListener(JambonzTranscriptionEvents.Transcription,
+          this.bugname = `${this.bugname_prefix}${this.vendor}_transcribe`;
+          this.addCustomEventListener(ep, JambonzTranscriptionEvents.Transcription,
             this._onTranscription.bind(this, cs, ep, channel));
-          ep.addCustomEventListener(JambonzTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
-          ep.addCustomEventListener(JambonzTranscriptionEvents.ConnectFailure,
+          this.addCustomEventListener(ep, JambonzTranscriptionEvents.Connect, this._onVendorConnect.bind(this, cs, ep));
+          this.addCustomEventListener(ep, JambonzTranscriptionEvents.ConnectFailure,
             this._onVendorConnectFailure.bind(this, cs, ep));
           break;
         }
@@ -258,7 +298,7 @@ class TaskTranscribe extends SttTask {
     }
 
     /* common handler for all stt engine errors */
-    ep.addCustomEventListener(JambonzTranscriptionEvents.Error, this._onJambonzError.bind(this, cs, ep));
+    this.addCustomEventListener(ep, JambonzTranscriptionEvents.Error, this._onJambonzError.bind(this, cs, ep));
     await ep.set(opts)
       .catch((err) => this.logger.info(err, 'Error setting channel variables'));
   }
@@ -273,11 +313,13 @@ class TaskTranscribe extends SttTask {
   }
 
   async _transcribe(ep) {
+    this.logger.debug(
+      `TaskTranscribe:_transcribe - starting transcription vendor ${this.vendor} bugname ${this.bugname}`);
     await ep.startTranscription({
       vendor: this.vendor,
       interim: this.interim ? true : false,
       locale: this.language,
-      channels: /*this.separateRecognitionPerChannel ? 2 : */ 1,
+      channels: 1,
       bugname: this.bugname,
       hostport: this.hostport
     });
@@ -286,81 +328,161 @@ class TaskTranscribe extends SttTask {
   async _onTranscription(cs, ep, channel, evt, fsEvent) {
     // make sure this is not a transcript from answering machine detection
     const bugname = fsEvent.getHeader('media-bugname');
+    const finished = fsEvent.getHeader('transcription-session-finished');
+    const bufferedTranscripts = this._bufferedTranscripts[channel - 1];
     if (bugname && this.bugname !== bugname) return;
+    if (this.paused) {
+      this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - paused, ignoring transcript');
+    }
 
     if (this.vendor === 'ibm' && evt?.state === 'listening') return;
 
     if (this.vendor === 'deepgram' && evt.type === 'UtteranceEnd') {
       /* we will only get this when we have set utterance_end_ms */
-      if (this._bufferedTranscripts.length === 0) {
+
+      /* DH: send a speech event when we get UtteranceEnd if they want interim events */
+      if (this.interim) {
+        this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram, sending speech event');
+        this._resolve(channel, evt);
+      }
+      if (bufferedTranscripts.length === 0) {
         this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram but no buffered transcripts');
       }
       else {
         this.logger.debug('Gather:_onTranscription - got UtteranceEnd event from deepgram, return buffered transcript');
-        evt = this.consolidateTranscripts(this._bufferedTranscripts, 1, this.language);
-        this._bufferedTranscripts = [];
-        this._resolve('speech', evt);
+        evt = this.consolidateTranscripts(bufferedTranscripts, channel, this.language, this.vendor);
+        evt.is_final = true;
+        this._bufferedTranscripts[channel - 1] = [];
+        this._resolve(channel, evt);
       }
       return;
     }
     this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - before normalization');
 
-    evt = this.normalizeTranscription(evt, this.vendor, channel, this.language);
+    evt = this.normalizeTranscription(evt, this.vendor, channel, this.language, undefined,
+      this.data.recognizer.punctuation);
     this.logger.debug({evt}, 'TaskTranscribe:_onTranscription');
     if (evt.alternatives.length === 0) {
       this.logger.info({evt}, 'TaskTranscribe:_onTranscription - got empty transcript, continue listening');
       return;
     }
 
-    if (evt.alternatives[0]?.transcript === '' && !cs.callGone && !this.killed) {
-      if (['microsoft', 'deepgram'].includes(this.vendor)) {
-        this.logger.info({evt}, 'TaskTranscribe:_onTranscription - got empty transcript, continue listening');
+    let emptyTranscript = false;
+    if (evt.is_final) {
+      if (evt.alternatives.length === 0 || evt.alternatives[0].transcript === '' && !cs.callGone && !this.killed) {
+        emptyTranscript = true;
+        if (finished === 'true' &&
+          ['microsoft', 'deepgram'].includes(this.vendor) &&
+          bufferedTranscripts.length === 0) {
+          this.logger.debug({evt}, 'TaskGather:_onTranscription - got empty transcript from old gather, disregarding');
+          return;
+        }
+        else if (this.vendor !== 'deepgram') {
+          this.logger.info({evt}, 'TaskGather:_onTranscription - got empty transcript, continue listening');
+          return;
+        }
+        else if (this.isContinuousAsr) {
+          this.logger.info({evt},
+            'TaskGather:_onTranscription - got empty deepgram transcript during continous asr, continue listening');
+          return;
+        }
+        else if (this.vendor === 'deepgram' && bufferedTranscripts.length > 0) {
+          this.logger.info({evt},
+            'TaskGather:_onTranscription - got empty transcript from deepgram, return the buffered transcripts');
+        }
+      }
+      if (this.isContinuousAsr) {
+        /* append the transcript and start listening again for asrTimeout */
+        const t = evt.alternatives[0].transcript;
+        if (t) {
+          /* remove trailing punctuation */
+          if (/[,;:\.!\?]$/.test(t)) {
+            this.logger.debug('TaskGather:_onTranscription - removing trailing punctuation');
+            evt.alternatives[0].transcript = t.slice(0, -1);
+          }
+        }
+        this.logger.info({evt}, 'TaskGather:_onTranscription - got transcript during continous asr');
+        bufferedTranscripts.push(evt);
+        this._startAsrTimer(channel);
+
+        /* some STT engines will keep listening after a final response, so no need to restart */
+        if (!['soniox', 'aws', 'microsoft', 'deepgram', 'google']
+          .includes(this.vendor)) this._startTranscribing(cs, ep, channel);
       }
       else {
-        this.logger.info({evt}, 'TaskTranscribe:_onTranscription - got empty transcript, listen again');
-        this._transcribe(ep);
-      }
-      return;
-    }
+        if (this.vendor === 'soniox') {
+          /* compile transcripts into one */
+          this._sonioxTranscripts.push(evt.vendor.finalWords);
+          evt = this.compileSonioxTranscripts(this._sonioxTranscripts, 1, this.language);
+          this._sonioxTranscripts = [];
+        }
+        else if (this.vendor === 'deepgram') {
+          /* compile transcripts into one */
+          if (!emptyTranscript) bufferedTranscripts.push(evt);
 
-    if (this.vendor === 'soniox') {
-      /* compile transcripts into one */
-      this._sonioxTranscripts.push(evt.vendor.finalWords);
-      if (evt.is_final) {
-        evt = this.compileSonioxTranscripts(this._sonioxTranscripts, 1, this.language);
-        this._sonioxTranscripts = [];
+          /* deepgram can send an empty and final transcript; only if we have any buffered should we resolve */
+          if (bufferedTranscripts.length === 0) return;
+          evt = this.consolidateTranscripts(bufferedTranscripts, channel, this.language);
+          this._bufferedTranscripts[channel - 1] = [];
+        }
+
+        /* here is where we return a final transcript */
+        this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - sending final transcript');
+        this._resolve(channel, evt);
+
+        /* some STT engines will keep listening after a final response, so no need to restart */
+        if (!['soniox', 'aws', 'microsoft', 'deepgram', 'google'].includes(this.vendor) &&
+          !this.vendor.startsWith('custom:')) {
+          this.logger.debug('TaskTranscribe:_onTranscription - restarting transcribe');
+          this._startTranscribing(cs, ep, channel);
+        }
       }
     }
+    else {
+      /* interim transcript */
 
-    if (this.isContinuousAsr && evt.is_final) {
-      this._bufferedTranscripts.push(evt);
-      this._startAsrTimer(channel);
-    } else {
-      await this._resolve(channel, evt);
+      /* deepgram can send a non-final transcript but with words that are final, so we need to buffer */
+      if (this.vendor === 'deepgram') {
+        const originalEvent = evt.vendor.evt;
+        if (originalEvent.is_final && evt.alternatives[0].transcript !== '') {
+          this.logger.debug({evt}, 'Gather:_onTranscription - buffering a completed (partial) deepgram transcript');
+          bufferedTranscripts.push(evt);
+        }
+      }
+
+      if (this.interim) {
+        this.logger.debug({evt}, 'TaskTranscribe:_onTranscription - sending interim transcript');
+        this._resolve(channel, evt);
+      }
     }
   }
 
   async _resolve(channel, evt) {
-    /* we've got a transcript, so end the otel child span for this channel */
-    if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
-      this.childSpan[channel - 1].span.setAttributes({
-        channel,
-        'stt.resolve': 'transcript',
-        'stt.result': JSON.stringify(evt)
-      });
-      this.childSpan[channel - 1].span.end();
+    if (evt.is_final) {
+      /* we've got a final transcript, so end the otel child span for this channel */
+      if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
+        this.childSpan[channel - 1].span.setAttributes({
+          channel,
+          'stt.resolve': 'transcript',
+          'stt.result': JSON.stringify(evt)
+        });
+        this.childSpan[channel - 1].span.end();
+      }
     }
 
     if (this.transcriptionHook) {
       const b3 = this.getTracingPropagation();
       const httpHeaders = b3 && {b3};
+      const payload = {
+        ...this.cs.callInfo,
+        ...httpHeaders,
+        ...(evt.alternatives && {speech: evt}),
+        ...(evt.type && {speechEvent: evt})
+      };
       try {
-        const json = await this.cs.requestor.request('verb:hook', this.transcriptionHook, {
-          ...this.cs.callInfo,
-          ...httpHeaders,
-          speech: evt
-        });
-        this.logger.info({json}, 'sent transcriptionHook');
+        this.logger.debug({payload}, 'sending transcriptionHook');
+        const json = await this.cs.requestor.request('verb:hook', this.transcriptionHook, payload);
+        this.logger.info({json}, 'completed transcriptionHook');
         if (json && Array.isArray(json) && !this.parentTask) {
           const makeTask = require('./make_task');
           const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));
@@ -381,7 +503,7 @@ class TaskTranscribe extends SttTask {
       this._clearTimer();
       this.notifyTaskDone();
     }
-    else {
+    else if (evt.is_final) {
       /* start another child span for this channel */
       const {span, ctx} = this.startChildSpan(`${STT_LISTEN_SPAN_NAME}:${channel}`);
       this.childSpan[channel - 1] = {span, ctx};
@@ -389,7 +511,8 @@ class TaskTranscribe extends SttTask {
   }
 
   _onNoAudio(cs, ep, channel) {
-    this.logger.debug(`TaskTranscribe:_onNoAudio restarting transcription on channel ${channel}`);
+    this.logger.debug(`TaskTranscribe:_onNoAudio on channel ${channel}`);
+    if (this.paused) return;
     if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
       this.childSpan[channel - 1].span.setAttributes({
         channel,
@@ -405,7 +528,8 @@ class TaskTranscribe extends SttTask {
   }
 
   _onMaxDurationExceeded(cs, ep, channel) {
-    this.logger.debug(`TaskTranscribe:_onMaxDurationExceeded restarting transcription on channel ${channel}`);
+    this.logger.debug(`TaskTranscribe:_onMaxDurationExceeded on channel ${channel}`);
+    if (this.paused) return;
     if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
       this.childSpan[channel - 1].span.setAttributes({
         channel,
@@ -428,44 +552,66 @@ class TaskTranscribe extends SttTask {
     }
   }
 
-  async _onJambonzError(cs, _ep, evt) {
-    this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
-    if (this.isHandledByPrimaryProvider && this.fallbackVendor) {
-      _ep.stopTranscription({vendor: this.vendor})
+  async _startFallback(cs, _ep, evt) {
+    if (this.canFallback) {
+      _ep.stopTranscription({
+        vendor: this.vendor,
+        bugname: this.bugname
+      })
         .catch((err) => this.logger.error({err}, `Error stopping transcription for primary vendor ${this.vendor}`));
       const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, cs.srf);
       try {
-        await this._fallback();
+        this.notifyError({ msg: 'ASR error',
+          details:`STT Vendor ${this.vendor} error: ${evt.error || evt.reason}`, failover: 'in progress'});
+        await this._initFallback();
         let channel = 1;
         if (this.ep !== _ep) {
           channel = 2;
         }
+        this[`_speechHandlersSet_${channel}`] = false;
         this._startTranscribing(cs, _ep, channel);
         updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid);
-        return;
+        return true;
       } catch (error) {
+        this.notifyError({ msg: 'ASR error',
+          details:`STT Vendor ${this.vendor} error: ${evt.error || evt.reason}`, failover: 'not available'});
         this.logger.info({error}, `There is error while falling back to ${this.fallbackVendor}`);
       }
     } else {
-      const {writeAlerts, AlertType} = cs.srf.locals;
+      this.logger.debug('transcribe:_startFallback no condition for falling back');
+      this.notifyError({ msg: 'ASR error',
+        details:`STT Vendor ${this.vendor} error: ${evt.error || evt.reason}`, failover: 'not available'});
+    }
+    return false;
+  }
 
-      if (this.vendor === 'nuance') {
-        const {code, error} = evt;
-        if (code === 404 && error === 'No speech') return this._resolve('timeout');
-        if (code === 413 && error === 'Too much speech') return this._resolve('timeout');
-      }
-      this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
-      writeAlerts({
-        account_sid: cs.accountSid,
-        alert_type: AlertType.STT_FAILURE,
-        message: `Custom speech vendor ${this.vendor} error: ${evt.error}`,
-        vendor: this.vendor,
-      }).catch((err) => this.logger.info({err}, 'Error generating alert for jambonz custom connection failure'));
-      this.notifyError({msg: 'ASR error', details:`Custom speech vendor ${this.vendor} error: ${evt.error}`});
+  async _onJambonzError(cs, _ep, evt) {
+    if (this.vendor === 'google' && evt.error_code === 0) {
+      this.logger.info({evt}, 'TaskTranscribe:_onJambonzError - ignoring google error code 0');
+      return;
+    }
+    this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
+    if (this.paused) return;
+    const {writeAlerts, AlertType} = cs.srf.locals;
+
+    if (this.vendor === 'nuance') {
+      const {code, error} = evt;
+      if (code === 404 && error === 'No speech') return this._resolve('timeout');
+      if (code === 413 && error === 'Too much speech') return this._resolve('timeout');
+    }
+    this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
+    writeAlerts({
+      account_sid: cs.accountSid,
+      alert_type: AlertType.STT_FAILURE,
+      message: `Custom speech vendor ${this.vendor} error: ${evt.error}`,
+      vendor: this.vendor,
+    }).catch((err) => this.logger.info({err}, 'Error generating alert for jambonz custom connection failure'));
+    if (!(await this._startFallback(cs, _ep, evt))) {
+      this.notifyTaskDone();
     }
   }
 
-  _onVendorConnectFailure(cs, _ep, channel, evt) {
+  async _onVendorConnectFailure(cs, _ep, channel, evt) {
     super._onVendorConnectFailure(cs, _ep, evt);
     if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
       this.childSpan[channel - 1].span.setAttributes({
@@ -474,7 +620,9 @@ class TaskTranscribe extends SttTask {
       });
       this.childSpan[channel - 1].span.end();
     }
-    this.notifyTaskDone();
+    if (!(await this._startFallback(cs, _ep, evt))) {
+      this.notifyTaskDone();
+    }
   }
 
   _startAsrTimer(channel) {
@@ -483,8 +631,9 @@ class TaskTranscribe extends SttTask {
     this._clearAsrTimer(channel);
     this._asrTimer = setTimeout(() => {
       this.logger.debug(`TaskTranscribe:_startAsrTimer - asr timer went off for channel: ${channel}`);
-      const evt = this.consolidateTranscripts(this._bufferedTranscripts, channel, this.language);
-      this._bufferedTranscripts = [];
+      const evt = this.consolidateTranscripts(
+        this._bufferedTranscripts[channel - 1], channel, this.language, this.vendor);
+      this._bufferedTranscripts[channel - 1] = [];
       this._resolve(channel, evt);
     }, this.asrTimeout);
     this.logger.debug(`TaskTranscribe:_startAsrTimer: set for ${this.asrTimeout}ms for channel ${channel}`);

lib/tasks/tts-task.js

@@ -0,0 +1,180 @@
+const Task = require('./task');
+const { TaskPreconditions } = require('../utils/constants');
+
+class TtsTask extends Task {
+
+  constructor(logger, data, parentTask) {
+    super(logger, data);
+    this.parentTask = parentTask;
+
+    this.preconditions = TaskPreconditions.Endpoint;
+
+    this.earlyMedia = this.data.earlyMedia === true || (parentTask && parentTask.earlyMedia);
+    this.synthesizer = this.data.synthesizer || {};
+    this.disableTtsCache = this.data.disableTtsCache;
+    this.options = this.synthesizer.options || {};
+  }
+
+  async exec(cs) {
+    super.exec(cs);
+  }
+
+  async _synthesizeWithSpecificVendor(cs, ep, {
+    vendor,
+    language,
+    voice,
+    label,
+    disableTtsStreaming,
+    preCache
+  }) {
+    const {srf, accountSid:account_sid} = cs;
+    const {updateSpeechCredentialLastUsed} = require('../utils/db-utils')(this.logger, srf);
+    const {writeAlerts, AlertType, stats} = srf.locals;
+    const {synthAudio} = srf.locals.dbHelpers;
+    const engine = this.synthesizer.engine || cs.synthesizer?.engine || 'neural';
+    const salt = cs.callSid;
+
+    let credentials = cs.getSpeechCredentials(vendor, 'tts', label);
+    /* parse Nuance voices into name and model */
+    let model;
+    if (vendor === 'nuance' && voice) {
+      const arr = /([A-Za-z-]*)\s+-\s+(enhanced|standard)/.exec(voice);
+      if (arr) {
+        voice = arr[1];
+        model = arr[2];
+      }
+    } else if (vendor === 'deepgram') {
+      model = voice;
+    }
+
+    /* allow for microsoft custom region voice and api_key to be specified as an override */
+    if (vendor === 'microsoft' && this.options.deploymentId) {
+      credentials = credentials || {};
+      credentials.use_custom_tts = true;
+      credentials.custom_tts_endpoint = this.options.deploymentId;
+      credentials.api_key = this.options.apiKey || credentials.apiKey;
+      credentials.region = this.options.region || credentials.region;
+      voice = this.options.voice || voice;
+    } else if (vendor === 'elevenlabs') {
+      credentials = credentials || {};
+      credentials.model_id = this.options.model_id || credentials.model_id;
+      credentials.voice_settings = this.options.voice_settings || {};
+      credentials.optimize_streaming_latency = this.options.optimize_streaming_latency
+      || credentials.optimize_streaming_latency;
+      voice = this.options.voice_id || voice;
+    }
+
+    ep.set({
+      tts_engine: vendor,
+      tts_voice: voice,
+      cache_speech_handles: 1,
+    }).catch((err) => this.logger.info({err}, `${this.name}: Error setting tts_engine on endpoint`));
+
+    if (!preCache) this.logger.info({vendor, language, voice, model}, `${this.name}:exec`);
+    try {
+      if (!credentials) {
+        writeAlerts({
+          account_sid,
+          alert_type: AlertType.TTS_NOT_PROVISIONED,
+          vendor
+        }).catch((err) => this.logger.info({err}, 'Error generating alert for no tts'));
+        this.notifyError({
+          msg: 'TTS error',
+          details:`No speech credentials provisioned for selected vendor ${vendor}`
+        });
+        throw new Error('no provisioned speech credentials for TTS');
+      }
+      // synthesize all of the text elements
+      let lastUpdated = false;
+
+      /* produce an audio segment from the provided text */
+      const generateAudio = async(text) => {
+        if (this.killed) return;
+        if (text.startsWith('silence_stream://')) return text;
+
+        /* otel: trace time for tts */
+        if (!preCache && !this.parentTask)  {
+          const {span} = this.startChildSpan('tts-generation', {
+            'tts.vendor': vendor,
+            'tts.language': language,
+            'tts.voice': voice
+          });
+          this.otelSpan = span;
+        }
+        try {
+          const {filePath, servedFromCache, rtt} = await synthAudio(stats, {
+            account_sid,
+            text,
+            vendor,
+            language,
+            voice,
+            engine,
+            model,
+            salt,
+            credentials,
+            options: this.options,
+            disableTtsCache : this.disableTtsCache,
+            disableTtsStreaming,
+            preCache
+          });
+          if (!filePath.startsWith('say:')) {
+            this.logger.debug(`file ${filePath}, served from cache ${servedFromCache}`);
+            if (filePath) cs.trackTmpFile(filePath);
+            if (this.otelSpan) {
+              this.otelSpan.setAttributes({'tts.cached': servedFromCache});
+              this.otelSpan.end();
+              this.otelSpan = null;
+            }
+            if (!servedFromCache && !lastUpdated) {
+              lastUpdated = true;
+              updateSpeechCredentialLastUsed(credentials.speech_credential_sid).catch(() => {/* logged error */});
+            }
+            if (!servedFromCache && rtt && !preCache) {
+              this.notifyStatus({
+                event: 'synthesized-audio',
+                vendor,
+                language,
+                characters: text.length,
+                elapsedTime: rtt
+              });
+            }
+          }
+          else {
+            this.logger.debug('a streaming tts api will be used');
+            const modifiedPath = filePath.replace('say:{', `say:{session-uuid=${ep.uuid},`);
+            return modifiedPath;
+          }
+          return filePath;
+        } catch (err) {
+          this.logger.info({err}, 'Error synthesizing tts');
+          if (this.otelSpan) this.otelSpan.end();
+          writeAlerts({
+            account_sid: cs.accountSid,
+            alert_type: AlertType.TTS_FAILURE,
+            vendor,
+            detail: err.message
+          }).catch((err) => this.logger.info({err}, 'Error generating alert for tts failure'));
+          this.notifyError({msg: 'TTS error', details: err.message || err});
+          throw err;
+        }
+      };
+
+      const arr = this.text.map((t) => (this._validateURL(t) ? t : generateAudio(t)));
+      return (await Promise.all(arr)).filter((fp) => fp && fp.length);
+    } catch (err) {
+      this.logger.info(err, 'TaskSay:exec error');
+      throw err;
+    }
+  }
+
+  _validateURL(urlString) {
+    try {
+      new URL(urlString);
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+}
+
+module.exports = TtsTask;

lib/utils/action-hook-delay.js

@@ -0,0 +1,175 @@
+const makeTask = require('../tasks/make_task');
+const Emitter = require('events');
+const { normalizeJambones } = require('@jambonz/verb-specifications');
+const {TaskName} = require('../utils/constants');
+const assert = require('assert');
+
+/**
+ * ActionHookDelayProcessor
+ * @extends Emitter
+ *
+ * @param {Object} logger - logger instance
+ * @param {Object} opts - options
+ * @param {Object} cs - call session
+ * @param {Object} ep - endpoint
+ *
+ * @emits {Event} 'giveup' - when associated giveup timer expires
+ *
+ * Ref:https://www.jambonz.org/docs/supporting-articles/handling-action-hook-delays/
+ */
+class ActionHookDelayProcessor extends Emitter {
+  constructor(logger, opts, cs) {
+    super();
+    this.logger = logger;
+    this.cs = cs;
+    this._active = false;
+
+    const enabled = this.init(opts);
+    if (enabled && (!this.actions || !Array.isArray(this.actions) || this.actions.length === 0)) {
+      throw new Error('ActionHookDelayProcessor: no actions specified');
+    }
+    else if (enabled && this.actions.some((a) => !a.verb || ![TaskName.Say, TaskName.Play].includes(a.verb))) {
+      throw new Error(`ActionHookDelayProcessor: invalid actions specified: ${JSON.stringify(this.actions)}`);
+    }
+  }
+
+  get properties() {
+    return {
+      actions: this.actions,
+      retries: this.retries,
+      noResponseTimeout: this.noResponseTimeout,
+      noResponseGiveUpTimeout: this.noResponseGiveUpTimeout
+    };
+  }
+
+  get ep() {
+    return this.cs.ep;
+  }
+
+  init(opts) {
+    this.logger.debug({opts}, 'ActionHookDelayProcessor#init');
+
+    this.actions = opts.actions;
+    this.retries = opts.retries || 0;
+    this.noResponseTimeout = opts.noResponseTimeout || 0;
+    this.noResponseGiveUpTimeout = opts.noResponseGiveUpTimeout;
+
+    // return false if these options actually disable the ahdp
+    return ('enable' in opts && opts.enable === true) ||
+      ('enabled' in opts && opts.enabled === true) ||
+      (!('enable' in opts) && !('enabled' in opts));
+  }
+
+  start() {
+    this.logger.debug('ActionHookDelayProcessor#start');
+    if (this._active) {
+      this.logger.debug('ActionHookDelayProcessor#start: already started due to prior gather which is continuing');
+      return;
+    }
+    assert(!this._noResponseTimer);
+    this._active = true;
+    this._retryCount = 0;
+    const timeoutMs =  this.noResponseTimeout === 0 ? 1 : this.noResponseTimeout * 1000;
+    this._noResponseTimer = setTimeout(this._onNoResponseTimer.bind(this), timeoutMs);
+
+    if (this.noResponseGiveUpTimeout > 0) {
+      const timeoutMs = this.noResponseGiveUpTimeout * 1000;
+      this._noResponseGiveUpTimer = setTimeout(this._onNoResponseGiveUpTimer.bind(this), timeoutMs);
+    }
+  }
+
+  async stop() {
+    this.logger.debug('ActionHookDelayProcessor#stop');
+    this._active = false;
+
+    if (this._noResponseTimer) {
+      clearTimeout(this._noResponseTimer);
+      this._noResponseTimer = null;
+    }
+    if (this._noResponseGiveUpTimer) {
+      clearTimeout(this._noResponseGiveUpTimer);
+      this._noResponseGiveUpTimer = null;
+    }
+    if (this._taskInProgress) {
+      this.logger.debug(`ActionHookDelayProcessor#stop: killing task in progress: ${this._taskInProgress.name}`);
+
+      /** if we are doing a play, kill it immediately
+       * if we are doing a say, wait for it to finish
+       */
+      if (TaskName.Say === this._taskInProgress.name) {
+        this._sayResolver = () => {
+          this.logger.debug('ActionHookDelayProcessor#stop: say is done, continue on..');
+          this._taskInProgress.kill(this.cs);
+          this._taskInProgress = null;
+        };
+        this.logger.debug('ActionHookDelayProcessor#stop returning promise');
+        return new Promise((resolve) => this._sayResolver = resolve);
+      }
+      else {
+        /* play */
+        this._taskInProgress.kill(this.cs);
+        this._taskInProgress = null;
+      }
+    }
+    this.logger.debug('ActionHookDelayProcessor#stop returning');
+  }
+
+  _onNoResponseTimer() {
+    this.logger.debug('ActionHookDelayProcessor#_onNoResponseTimer');
+    this._noResponseTimer = null;
+
+    /* get the next play or say action */
+    const verb = this.actions[this._retryCount % this.actions.length];
+
+    const t = normalizeJambones(this.logger, [verb]);
+    this.logger.debug({verb}, 'ActionHookDelayProcessor#_onNoResponseTimer: starting action');
+    try {
+      this._taskInProgress = makeTask(this.logger, t[0]);
+      this._taskInProgress.disableTracing = true;
+      this._taskInProgress.exec(this.cs, {ep: this.ep});
+    } catch (err) {
+      this.logger.info(err, 'ActionHookDelayProcessor#_onNoResponseTimer: error starting action');
+      this._taskInProgress = null;
+      return;
+    }
+
+    this.ep.once('playback-start', (evt) => {
+      this.logger.debug({evt}, 'got playback-start');
+      if (!this._active) {
+        this.logger.info({evt}, 'ActionHookDelayProcessor#_onNoResponseTimer: killing audio immediately');
+        this.ep.api('uuid_break', this.ep.uuid)
+          .catch((err) => this.logger.info(err,
+            'ActionHookDelayProcessor#_onNoResponseTimer Error killing audio'));
+      }
+    });
+
+    this.ep.once('playback-stop', (evt) => {
+      this._taskInProgress = null;
+      if (this._sayResolver) {
+        /* we were waiting for the play to finish before continuing to next task */
+        this.logger.debug({evt}, 'got playback-stop');
+        this._sayResolver();
+        this._sayResolver = null;
+      }
+      else {
+        /* possibly start the no response timer again */
+        if (this._active && this.retries > 0 && this._retryCount < this.retries && this.noResponseTimeout > 0) {
+          this.logger.debug({evt}, 'ActionHookDelayProcessor#_onNoResponseTimer: playback-stop on play/say action');
+          const timeoutMs = this.noResponseTimeout * 1000;
+          this._noResponseTimer = setTimeout(this._onNoResponseTimer.bind(this), timeoutMs);
+        }
+      }
+    });
+
+    this._retryCount++;
+  }
+
+  _onNoResponseGiveUpTimer() {
+    this._active = false;
+    this.logger.info('ActionHookDelayProcessor#_onNoResponseGiveUpTimer');
+    this.stop().catch((err) => {});
+    this.emit('giveup');
+  }
+}
+
+module.exports = ActionHookDelayProcessor;

lib/utils/amd-utils.js

@@ -266,7 +266,7 @@ module.exports = (logger) => {
 
     /* set stt options */
     logger.info(`starting amd for vendor ${vendor} and language ${language}`);
-    const sttOpts = amd.setChannelVarsForStt({name: TaskName.Gather}, sttCredentials, {
+    const sttOpts = amd.setChannelVarsForStt({name: TaskName.Gather}, sttCredentials, language, {
       vendor,
       hints,
       enhancedModel: true,

lib/utils/background-task-manager.js

@@ -0,0 +1,198 @@
+const { normalizeJambones } = require('@jambonz/verb-specifications');
+const makeTask = require('../tasks/make_task');
+const { JAMBONZ_RECORD_WS_BASE_URL, JAMBONZ_RECORD_WS_USERNAME, JAMBONZ_RECORD_WS_PASSWORD } = require('../config');
+const Emitter = require('events');
+
+class BackgroundTaskManager extends Emitter {
+  constructor({cs, logger, rootSpan}) {
+    super();
+    this.tasks = new Map();
+    this.cs = cs;
+    this.logger = logger;
+    this.rootSpan = rootSpan;
+  }
+
+  isTaskRunning(type) {
+    return this.tasks.has(type);
+  }
+
+  getTask(type) {
+    if (this.tasks.has(type)) {
+      return this.tasks.get(type);
+    }
+  }
+
+  count() {
+    return this.tasks.size;
+  }
+
+  async newTask(type, opts, sticky = false) {
+    this.logger.info({opts}, `initiating Background task ${type}`);
+    if (this.tasks.has(type)) {
+      this.logger.info(`Background task ${type} is running, skipped`);
+      return;
+    }
+    let task;
+    switch (type) {
+      case 'listen':
+        task = await this._initListen(opts);
+        break;
+      case 'bargeIn':
+        task = await this._initBargeIn(opts);
+        break;
+      case 'record':
+        task = await this._initRecord();
+        break;
+      case 'transcribe':
+        task = await this._initTranscribe(opts);
+        break;
+      default:
+        break;
+    }
+    if (task) {
+      this.tasks.set(type, task);
+    }
+    if (task && sticky) task.sticky = true;
+    return task;
+  }
+
+  stop(type) {
+    const task = this.getTask(type);
+    if (task) {
+      this.logger.info(`stopping background task: ${type}`);
+      task.removeAllListeners();
+      task.span.end();
+      task.kill();
+      // Remove task from managed List
+      this.tasks.delete(type);
+    }
+  }
+
+  stopAll() {
+    this.logger.debug('BackgroundTaskManager:stopAll');
+    for (const key of this.tasks.keys()) {
+      this.stop(key);
+    }
+  }
+
+  // Initiate Listen
+  async _initListen(opts, bugname = 'jambonz-background-listen', ignoreCustomerData = false, type = 'listen') {
+    let task;
+    try {
+      const t = normalizeJambones(this.logger, [opts]);
+      task = makeTask(this.logger, t[0]);
+      task.bugname = bugname;
+      task.ignoreCustomerData = ignoreCustomerData;
+      const resources = await this.cs._evaluatePreconditions(task);
+      const {span, ctx} = this.rootSpan.startChildSpan(`background-${type}:${task.summary}`);
+      task.span = span;
+      task.ctx = ctx;
+      task.exec(this.cs, resources)
+        .then(this._taskCompleted.bind(this, type, task))
+        .catch(this._taskError.bind(this, type, task));
+    } catch (err) {
+      this.logger.info({err, opts}, `BackgroundTaskManager:_initListen - Error creating ${bugname} task`);
+    }
+    return task;
+  }
+
+  // Initiate Gather
+  async _initBargeIn(opts) {
+    let task;
+    try {
+      const t = normalizeJambones(this.logger, [opts]);
+      task = makeTask(this.logger, t[0]);
+      task
+        .once('dtmf', this._bargeInTaskCompleted.bind(this))
+        .once('vad', this._bargeInTaskCompleted.bind(this))
+        .once('transcription', this._bargeInTaskCompleted.bind(this))
+        .once('timeout', this._bargeInTaskCompleted.bind(this));
+      const resources = await this.cs._evaluatePreconditions(task);
+      const {span, ctx} = this.rootSpan.startChildSpan(`background-bargeIn:${task.summary}`);
+      task.span = span;
+      task.ctx = ctx;
+      task.bugname_prefix = 'background_bargeIn_';
+      task.exec(this.cs, resources)
+        .then(() => {
+          this._taskCompleted('bargeIn', task);
+          if (task.sticky && !this.cs.callGone && !this.cs._stopping) {
+            this.logger.info('BackgroundTaskManager:_initBargeIn: restarting background bargeIn');
+            this._bargeInHandled = false;
+            this.newTask('bargeIn', opts, true);
+          }
+          return;
+        })
+        .catch(this._taskError.bind(this, 'bargeIn', task));
+    } catch (err) {
+      this.logger.info(err, 'BackgroundTaskManager:_initGather - Error creating bargeIn task');
+    }
+    return task;
+  }
+
+  // Initiate Record
+  async _initRecord() {
+    if (this.cs.accountInfo.account.record_all_calls || this.cs.application.record_all_calls) {
+      if (!JAMBONZ_RECORD_WS_BASE_URL || !this.cs.accountInfo.account.bucket_credential) {
+        this.logger.error('_initRecord: invalid cfg - missing JAMBONZ_RECORD_WS_BASE_URL or bucket config');
+        return undefined;
+      }
+      const listenOpts = {
+        url: `${JAMBONZ_RECORD_WS_BASE_URL}/record/${this.cs.accountInfo.account.bucket_credential.vendor}`,
+        disableBidirectionalAudio: true,
+        mixType : 'stereo',
+        passDtmf: true
+      };
+      if (JAMBONZ_RECORD_WS_USERNAME && JAMBONZ_RECORD_WS_PASSWORD) {
+        listenOpts.wsAuth = {
+          username: JAMBONZ_RECORD_WS_USERNAME,
+          password: JAMBONZ_RECORD_WS_PASSWORD
+        };
+      }
+      this.logger.debug({listenOpts}, '_initRecord: enabling listen');
+      return await this._initListen({verb: 'listen', ...listenOpts}, 'jambonz-session-record', true, 'record');
+    }
+  }
+
+  // Initiate Transcribe
+  async _initTranscribe(opts) {
+    let task;
+    try {
+      const t = normalizeJambones(this.logger, [opts]);
+      task = makeTask(this.logger, t[0]);
+      const resources = await this.cs._evaluatePreconditions(task);
+      const {span, ctx} = this.rootSpan.startChildSpan(`background-transcribe:${task.summary}`);
+      task.span = span;
+      task.ctx = ctx;
+      task.bugname_prefix = 'background_transcribe_';
+      task.exec(this.cs, resources)
+        .then(this._taskCompleted.bind(this, 'transcribe', task))
+        .catch(this._taskError.bind(this, 'transcribe', task));
+    } catch (err) {
+      this.logger.info(err, 'BackgroundTaskManager:_initTranscribe - Error creating transcribe task');
+    }
+    return task;
+  }
+
+  _taskCompleted(type, task) {
+    this.logger.debug({type, task}, `BackgroundTaskManager:_taskCompleted: task completed, sticky: ${task.sticky}`);
+    task.removeAllListeners();
+    task.span.end();
+    this.tasks.delete(type);
+  }
+  _taskError(type, task, error) {
+    this.logger.info({type, task, error}, 'BackgroundTaskManager:_taskError: task Error');
+    task.removeAllListeners();
+    task.span.end();
+    this.tasks.delete(type);
+  }
+
+  _bargeInTaskCompleted(evt) {
+    if (this._bargeInHandled) return;
+    this._bargeInHandled = true;
+    this.logger.debug({evt},
+      'BackgroundTaskManager:_bargeInTaskCompleted on event from background bargeIn, emitting bargein-done event');
+    this.emit('bargeIn-done', evt);
+  }
+}
+
+module.exports = BackgroundTaskManager;

lib/utils/constants.json

@@ -1,12 +1,13 @@
 {
   "TaskName": {
-    "Cognigy": "cognigy",
+    "Answer": "answer",
     "Conference": "conference",
     "Config": "config",
     "Dequeue": "dequeue",
     "Dial": "dial",
     "Dialogflow": "dialogflow",
     "Dtmf": "dtmf",
+    "Dub": "dub",
     "Enqueue": "enqueue",
     "Gather": "gather",
     "Hangup": "hangup",
@@ -29,7 +30,8 @@
     "Tag": "tag",
     "Transcribe": "transcribe"
   },
-  "AllowedSipRecVerbs": ["config", "gather", "transcribe", "listen", "tag"],
+  "AllowedSipRecVerbs": ["answer", "config", "gather", "transcribe", "listen", "tag"],
+  "AllowedConfirmSessionVerbs": ["config", "gather", "plays", "say", "tag"],
   "CallStatus": {
     "Trying": "trying",
     "Ringing": "ringing",
@@ -95,6 +97,10 @@
     "Transcription": "soniox_transcribe::transcription",
     "Error": "soniox_transcribe::error"
   },
+  "VerbioTranscriptionEvents": {
+    "Transcription": "verbio_transcribe::transcription",
+    "Error": "verbio_transcribe::error"
+  },
   "CobaltTranscriptionEvents": {
     "Transcription": "cobalt_speech::transcription",
     "CompileContext": "cobalt_speech::compile_context_response",
@@ -132,6 +138,9 @@
     "ConnectFailure": "assemblyai_transcribe::connect_failed",
     "Connect": "assemblyai_transcribe::connect"
   },
+  "VadDetection": {
+    "Detection": "vad_detect:detection"
+  },
   "ListenEvents": {
     "Connect": "mod_audio_fork::connect",
     "ConnectFailure": "mod_audio_fork::connect_failed",
@@ -169,6 +178,7 @@
     "session:new",
     "session:reconnect",
     "session:redirect",
+    "session:adulting",
     "call:status",
     "queue:status",
     "dial:confirm",

lib/utils/db-utils.js

@@ -41,6 +41,7 @@ const speechMapper = (cred) => {
       const o = JSON.parse(decrypt(credential));
       obj.access_key_id = o.access_key_id;
       obj.secret_access_key = o.secret_access_key;
+      obj.role_arn = o.role_arn;
       obj.aws_region = o.aws_region;
     }
     else if ('microsoft' === obj.vendor) {
@@ -75,6 +76,8 @@ const speechMapper = (cred) => {
     else if ('deepgram' === obj.vendor) {
       const o = JSON.parse(decrypt(credential));
       obj.api_key = o.api_key;
+      obj.deepgram_stt_uri = o.deepgram_stt_uri;
+      obj.deepgram_stt_use_tls = o.deepgram_stt_use_tls;
     }
     else if ('soniox' === obj.vendor) {
       const o = JSON.parse(decrypt(credential));
@@ -92,6 +95,17 @@ const speechMapper = (cred) => {
       obj.api_key = o.api_key;
       obj.model_id = o.model_id;
       obj.options = o.options;
+    } else if ('playht' === obj.vendor) {
+      const o = JSON.parse(decrypt(credential));
+      obj.api_key = o.api_key;
+      obj.user_id = o.user_id;
+      obj.voice_engine = o.voice_engine;
+      obj.options = o.options;
+    } else if ('rimelabs' === obj.vendor) {
+      const o = JSON.parse(decrypt(credential));
+      obj.api_key = o.api_key;
+      obj.model_id = o.model_id;
+      obj.options = o.options;
     } else if ('assemblyai' === obj.vendor) {
       const o = JSON.parse(decrypt(credential));
       obj.api_key = o.api_key;
@@ -99,6 +113,11 @@ const speechMapper = (cred) => {
       const o = JSON.parse(decrypt(credential));
       obj.api_key = o.api_key;
       obj.model_id = o.model_id;
+    }  else if ('verbio' === obj.vendor) {
+      const o = JSON.parse(decrypt(credential));
+      obj.client_id = o.client_id;
+      obj.client_secret = o.client_secret;
+      obj.engine_version = o.engine_version;
     } else if (obj.vendor.startsWith('custom:')) {
       const o = JSON.parse(decrypt(credential));
       obj.auth_token = o.auth_token;

lib/utils/http-requestor.js

@@ -14,6 +14,7 @@ const {
   HTTP_PROXY_PORT,
   HTTP_PROXY_PROTOCOL,
   NODE_ENV,
+  HTTP_USER_AGENT_HEADER,
 } = require('../config');
 
 const toBase64 = (str) => Buffer.from(str || '', 'utf8').toString('base64');
@@ -116,6 +117,10 @@ class HttpRequestor extends BaseRequestor {
     const url = hook.url || hook;
     const method = hook.method || 'POST';
     let buf = '';
+    httpHeaders = {
+      ...httpHeaders,
+      ...(HTTP_USER_AGENT_HEADER && {'user-agent' : HTTP_USER_AGENT_HEADER})
+    };
 
     assert.ok(url, 'HttpRequestor:request url was not provided');
     assert.ok, (['GET', 'POST'].includes(method), `HttpRequestor:request method must be 'GET' or 'POST' not ${method}`);

lib/utils/install-srf-locals.js

@@ -171,13 +171,16 @@ function installSrfLocals(srf, logger) {
     retrieveFromSortedSet,
     retrieveByPatternSortedSet,
     sortedSetLength,
-    sortedSetPositionByPattern
+    sortedSetPositionByPattern,
   } = require('@jambonz/realtimedb-helpers')({}, logger, tracer);
   const registrar = new Registrar(logger, client);
   const {
     synthAudio,
+    addFileToCache,
     getNuanceAccessToken,
     getIbmAccessToken,
+    getAwsAuthToken,
+    getVerbioAccessToken
   } = require('@jambonz/speech-utils')({}, logger);
   const {
     writeAlerts,
@@ -215,6 +218,8 @@ function installSrfLocals(srf, logger) {
       listCalls,
       deleteCall,
       synthAudio,
+      getAwsAuthToken,
+      addFileToCache,
       createHash,
       retrieveHash,
       deleteKey,
@@ -235,7 +240,8 @@ function installSrfLocals(srf, logger) {
       retrieveFromSortedSet,
       retrieveByPatternSortedSet,
       sortedSetLength,
-      sortedSetPositionByPattern
+      sortedSetPositionByPattern,
+      getVerbioAccessToken
     },
     parentLogger: logger,
     getSBC,

lib/utils/parse-decibels.js

@@ -0,0 +1,18 @@
+const parseDecibels = (db) => {
+  if (!db) return 0;
+  if (typeof db === 'number') {
+    return db;
+  }
+  else if (typeof db === 'string') {
+    const match = db.match(/([+-]?\d+(\.\d+)?)\s*db/i);
+    if (match) {
+      return Math.trunc(parseFloat(match[1]));
+    } else {
+      return 0;
+    }
+  } else {
+    return 0;
+  }
+};
+
+module.exports = parseDecibels;

lib/utils/place-outdial.js

@@ -16,9 +16,13 @@ const uuidv4 = require('uuid-random');
 const HttpRequestor = require('./http-requestor');
 const WsRequestor = require('./ws-requestor');
 const {makeOpusFirst} = require('./sdp-utils');
+const {
+  JAMBONES_USE_FREESWITCH_TIMER_FD
+} = require('../config');
 
 class SingleDialer extends Emitter {
-  constructor({logger, sbcAddress, target, opts, application, callInfo, accountInfo, rootSpan, startSpan, dialTask}) {
+  constructor({logger, sbcAddress, target, opts, application, callInfo, accountInfo, rootSpan, startSpan, dialTask,
+    onHoldMusic}) {
     super();
     assert(target.type);
 
@@ -41,6 +45,7 @@ class SingleDialer extends Emitter {
 
     this.callSid = uuidv4();
     this.dialTask = dialTask;
+    this.onHoldMusic = onHoldMusic;
 
     this.on('callStatusChange', this._notifyCallStatusChange.bind(this));
   }
@@ -131,6 +136,7 @@ class SingleDialer extends Emitter {
       this.serviceUrl = srf.locals.serviceUrl;
 
       this.ep = await ms.createEndpoint();
+      this._configMsEndpoint();
       this.logger.debug(`SingleDialer:exec - created endpoint ${this.ep.uuid}`);
 
       /**
@@ -189,6 +195,10 @@ class SingleDialer extends Emitter {
             callSid: this.callSid,
             traceId: this.rootSpan.traceId
           });
+          if (this.dialTask && this.dialTask.tag !== null &&
+            typeof this.dialTask.tag === 'object' && !Array.isArray(this.dialTask.tag)) {
+            this.callInfo.customerData = this.dialTask.tag;
+          }
           this.logger = srf.locals.parentLogger.child({
             callSid: this.callSid,
             parentCallSid: this.parentCallInfo.callSid,
@@ -253,7 +263,7 @@ class SingleDialer extends Emitter {
         .on('modify', async(req, res) => {
           try {
             if (this.ep) {
-              if (this.dialTask && this.dialTask.isOnHold) {
+              if (this.dialTask && this.dialTask.isOnHoldEnabled) {
                 this.logger.info('dial is onhold, emit event');
                 this.emit('reinvite', req, res);
               } else {
@@ -285,17 +295,17 @@ class SingleDialer extends Emitter {
         if (err.status === 487) status.callStatus = CallStatus.NoAnswer;
         else if ([486, 600].includes(err.status)) status.callStatus = CallStatus.Busy;
         this.logger.info(`SingleDialer:exec outdial failure ${err.status}`);
-        inviteSpan.setAttributes({'invite.status_code': err.status});
-        inviteSpan.end();
+        inviteSpan?.setAttributes({'invite.status_code': err.status});
+        inviteSpan?.end();
       }
       else {
         this.logger.error(err, 'SingleDialer:exec');
         status.sipStatus = 500;
-        inviteSpan.setAttributes({
+        inviteSpan?.setAttributes({
           'invite.status_code': 500,
           'invite.err': err.message
         });
-        inviteSpan.end();
+        inviteSpan?.end();
       }
       this.emit('callStatusChange', status);
       if (this.ep) this.ep.destroy();
@@ -320,6 +330,16 @@ class SingleDialer extends Emitter {
     }
   }
 
+  _configMsEndpoint() {
+    const opts = {
+      ...(this.onHoldMusic && {holdMusic: `shout://${this.onHoldMusic.replace(/^https?:\/\//, '')}`}),
+      ...(JAMBONES_USE_FREESWITCH_TIMER_FD && {timer_name: 'timerfd'})
+    };
+    if (Object.keys(opts).length > 0) {
+      this.ep.set(opts);
+    }
+  }
+
   /**
    * Run an application on the call after answer, e.g. call screening.
    * Once the application completes in some fashion, emit an 'accepted' event
@@ -333,6 +353,7 @@ class SingleDialer extends Emitter {
       const json = await this.requestor.request('dial:confirm', confirmHook, this.callInfo.toJSON());
       if (!json || (Array.isArray(json) && json.length === 0)) {
         this.logger.info('SingleDialer:_executeApp: no tasks returned from confirm hook');
+        this.emit('accept');
         return;
       }
       const tasks = normalizeJambones(this.logger, json).map((tdata) => makeTask(this.logger, tdata));
@@ -392,6 +413,7 @@ class SingleDialer extends Emitter {
     const app = {...application};
     if ('WS' === app.call_hook?.method ||
       app.call_hook?.url.startsWith('ws://') || app.call_hook?.url.startsWith('wss://')) {
+      if (app.call_hook?.url) app.call_hook.url += '/adulting';
       const requestor = new WsRequestor(logger, this.accountInfo.account.account_sid,
         app.call_hook, this.accountInfo.account.webhook_secret);
       app.requestor = requestor;
@@ -406,6 +428,8 @@ class SingleDialer extends Emitter {
         this.accountInfo.account.webhook_secret);
       else app.notifier = {request: () => {}, close: () => {}};
     }
+    // Replace old application with new application.
+    this.application = app;
     const cs = new AdultingCallSession({
       logger: newLogger,
       singleDialer: this,
@@ -415,6 +439,13 @@ class SingleDialer extends Emitter {
       tasks,
       rootSpan
     });
+    app.requestor.request('session:adulting', '/adulting', {
+      ...cs.callInfo.toJSON(),
+      parentCallInfo: this.parentCallInfo
+    }).catch((err) => {
+      newLogger.error({err}, 'doAdulting: error sending adulting request');
+    });
+
     cs.req = this.req;
     cs.exec().catch((err) => newLogger.error({err}, 'doAdulting: error executing session'));
     return cs;
@@ -436,6 +467,7 @@ class SingleDialer extends Emitter {
   async reAnchorMedia() {
     assert(this.dlg && this.dlg.connected && !this.ep);
     this.ep = await this.ms.createEndpoint({remoteSdp: this.dlg.remote.sdp});
+    this._configMsEndpoint();
     await this.dlg.modify(this.ep.local.sdp, {
       headers: {
         'X-Reason': 'anchor-media'
@@ -466,11 +498,12 @@ class SingleDialer extends Emitter {
 }
 
 function placeOutdial({
-  logger, srf, ms, sbcAddress, target, opts, application, callInfo, accountInfo, rootSpan, startSpan, dialTask
+  logger, srf, ms, sbcAddress, target, opts, application, callInfo, accountInfo, rootSpan, startSpan, dialTask,
+  onHoldMusic
 }) {
   const myOpts = deepcopy(opts);
   const sd = new SingleDialer({
-    logger, sbcAddress, target, myOpts, application, callInfo, accountInfo, rootSpan, startSpan, dialTask
+    logger, sbcAddress, target, myOpts, application, callInfo, accountInfo, rootSpan, startSpan, dialTask, onHoldMusic
   });
   sd.exec(srf, ms, myOpts);
   return sd;

lib/utils/siprec-utils.js

@@ -97,8 +97,12 @@ const parseSiprecPayload = (req, logger) => {
             obj[`${prefix}participantstreamassoc`].forEach((ps) => {
               const part = participants[ps.$.participant_id];
               if (part) {
-                part.send = ps[`${prefix}send`][0];
-                part.recv = ps[`${prefix}recv`][0];
+                if (ps.hasOwnProperty(`${prefix}send`)) {
+                  part.send = ps[`${prefix}send`][0];
+                }
+                if (ps.hasOwnProperty(`${prefix}recv`)) {
+                  part.recv = ps[`${prefix}recv`][0];
+                }
               }
             });
           }
@@ -109,9 +113,9 @@ const parseSiprecPayload = (req, logger) => {
           obj[`${prefix}stream`].forEach((s) => {
             const streamId = s.$.stream_id;
             let sender;
-            for (const [k, v] of Object.entries(participants)) {
+            for (const v of Object.values(participants)) {
               if (v.send === streamId) {
-                sender = k;
+                sender = v;
                 break;
               }
             }
@@ -121,9 +125,15 @@ const parseSiprecPayload = (req, logger) => {
 
             sender.label = s[`${prefix}label`][0];
 
-            if (-1 !== ['1', 'a_leg', 'inbound'].indexOf(sender.label)) {
-              opts.caller.aor = sender.aor ;
+            if (-1 !== ['1', 'a_leg', 'inbound', '10'].indexOf(sender.label)) {
+              opts.caller.aor = sender.aor;
               if (sender.name) opts.caller.name = sender.name;
+              // Remap the sdp stream base on sender label
+              if (!opts.sdp1.includes(`a=label:${sender.label}`)) {
+                const tmp = opts.sdp1;
+                opts.sdp1 = opts.sdp2;
+                opts.sdp2 = tmp;
+              }
             }
             else {
               opts.callee.aor = sender.aor ;

lib/utils/transcription-utils.js

@@ -1,15 +1,5 @@
 const {
   TaskName,
-  AzureTranscriptionEvents,
-  GoogleTranscriptionEvents,
-  AwsTranscriptionEvents,
-  NuanceTranscriptionEvents,
-  DeepgramTranscriptionEvents,
-  SonioxTranscriptionEvents,
-  NvidiaTranscriptionEvents,
-  CobaltTranscriptionEvents,
-  JambonzTranscriptionEvents,
-  AssemblyAiTranscriptionEvents
 } = require('./constants.json');
 
 const stickyVars = {
@@ -112,7 +102,55 @@ const stickyVars = {
   ]
 };
 
-const consolidateTranscripts = (bufferedTranscripts, channel, language) => {
+/**
+ * @see https://developers.deepgram.com/docs/models-languages-overview
+ */
+const optimalDeepramModels = {
+  zh: ['base', 'base'],
+  'zh-CN':['base', 'base'],
+  'zh-TW': ['base', 'base'],
+  da: ['enhanced', 'enhanced'],
+  en: ['nova-2-phonecall', 'nova-2'],
+  'en-US': ['nova-2-phonecall', 'nova-2'],
+  'en-AU': ['nova-2', 'nova-2'],
+  'en-GB': ['nova-2', 'nova-2'],
+  'en-IN': ['nova-2', 'nova-2'],
+  'en-NZ': ['nova-2', 'nova-2'],
+  nl: ['nova-2', 'nova-2'],
+  fr: ['nova-2', 'nova-2'],
+  'fr-CA': ['nova-2', 'nova-2'],
+  de: ['nova-2', 'nova-2'],
+  hi: ['nova-2', 'nova-2'],
+  'hi-Latn': ['nova-2', 'nova-2'],
+  id: ['base', 'base'],
+  it: ['nova-2', 'nova-2'],
+  ja: ['enhanced', 'enhanced'],
+  ko: ['nova-2', 'nova-2'],
+  no: ['nova-2', 'nova-2'],
+  pl: ['nova-2', 'nova-2'],
+  pt: ['nova-2', 'nova-2'],
+  'pt-BR': ['nova-2', 'nova-2'],
+  'pt-PT': ['nova-2', 'nova-2'],
+  ru: ['nova-2', 'nova-2'],
+  es: ['nova-2', 'nova-2'],
+  'es-419': ['nova-2', 'nova-2'],
+  'es-LATAM': ['enhanced', 'enhanced'],
+  sv: ['nova-2', 'nova-2'],
+  ta: ['enhanced', 'enhanced'],
+  taq: ['enhanced', 'enhanced'],
+  tr: ['nova-2', 'nova-2'],
+  uk: ['nova-2', 'nova-2']
+};
+
+const selectDefaultDeepgramModel = (task, language) => {
+  if (language in optimalDeepramModels) {
+    const [gather, transcribe] = optimalDeepramModels[language];
+    return task.name === TaskName.Gather ? gather : transcribe;
+  }
+  return 'base';
+};
+
+const consolidateTranscripts = (bufferedTranscripts, channel, language, vendor) => {
   if (bufferedTranscripts.length === 1) return bufferedTranscripts[0];
   let totalConfidence = 0;
   const finalTranscript = bufferedTranscripts.reduce((acc, evt) => {
@@ -153,7 +191,7 @@ const consolidateTranscripts = (bufferedTranscripts, channel, language) => {
     totalConfidence / bufferedTranscripts.length;
   finalTranscript.alternatives[0].transcript = finalTranscript.alternatives[0].transcript.trim();
   finalTranscript.vendor = {
-    name: 'deepgram',
+    name: vendor,
     evt: bufferedTranscripts
   };
   return finalTranscript;
@@ -232,7 +270,7 @@ const normalizeDeepgram = (evt, channel, language, shortUtterance) => {
     language_code: language,
     channel_tag: channel,
     is_final: shortUtterance ? evt.is_final : evt.speech_final,
-    alternatives: [alternatives[0]],
+    alternatives: alternatives.length ? [alternatives[0]] : [],
     vendor: {
       name: 'deepgram',
       evt: copy
@@ -338,19 +376,34 @@ const normalizeNuance = (evt, channel, language) => {
   };
 };
 
-const normalizeMicrosoft = (evt, channel, language) => {
+const normalizeVerbio = (evt, channel, language) => {
+  const copy = JSON.parse(JSON.stringify(evt));
+  return {
+    language_code: language,
+    channel_tag: channel,
+    is_final: evt.is_final,
+    alternatives: evt.alternatives,
+    vendor: {
+      name: 'verbio',
+      evt: copy
+    }
+  };
+};
+
+const normalizeMicrosoft = (evt, channel, language, punctuation = true) => {
   const copy = JSON.parse(JSON.stringify(evt));
   const nbest = evt.NBest;
   const language_code = evt.PrimaryLanguage?.Language || language;
   const alternatives = nbest ? nbest.map((n) => {
     return {
       confidence: n.Confidence,
-      transcript: n.Display
+      // remove all puntuation if needed
+      transcript: punctuation ? n.Display : n.Display.replace(/\p{P}/gu, '')
     };
   }) :
     [
       {
-        transcript: evt.DisplayText || evt.Text
+        transcript: punctuation ? evt.DisplayText || evt.Text : (evt.DisplayText || evt.Text).replace(/\p{P}/gu, '')
       }
     ];
 
@@ -400,14 +453,14 @@ const normalizeAssemblyAi = (evt, channel, language) => {
 };
 
 module.exports = (logger) => {
-  const normalizeTranscription = (evt, vendor, channel, language, shortUtterance) => {
+  const normalizeTranscription = (evt, vendor, channel, language, shortUtterance, punctuation) => {
 
     //logger.debug({ evt, vendor, channel, language }, 'normalizeTranscription');
     switch (vendor) {
       case 'deepgram':
         return normalizeDeepgram(evt, channel, language, shortUtterance);
       case 'microsoft':
-        return normalizeMicrosoft(evt, channel, language);
+        return normalizeMicrosoft(evt, channel, language, punctuation);
       case 'google':
         return normalizeGoogle(evt, channel, language);
       case 'aws':
@@ -424,6 +477,8 @@ module.exports = (logger) => {
         return normalizeCobalt(evt, channel, language);
       case 'assemblyai':
         return normalizeAssemblyAi(evt, channel, language, shortUtterance);
+      case 'verbio':
+        return normalizeVerbio(evt, channel, language);
       default:
         if (vendor.startsWith('custom:')) {
           return normalizeCustom(evt, channel, language, vendor);
@@ -433,22 +488,15 @@ module.exports = (logger) => {
     }
   };
 
-  const setChannelVarsForStt = (task, sttCredentials, rOpts = {}) => {
+  const setChannelVarsForStt = (task, sttCredentials, language, rOpts = {}) => {
     let opts = {};
-    const {enable, voiceMs = 0, mode = -1} = rOpts.vad || {};
-    const vad = {enable, voiceMs, mode};
     const vendor = rOpts.vendor;
 
-    /* voice activity detection works across vendors */
-    opts = {
-      ...opts,
-      ...(vad.enable && {START_RECOGNIZING_ON_VAD: 1}),
-      ...(vad.enable && vad.voiceMs && {RECOGNIZER_VAD_VOICE_MS: vad.voiceMs}),
-      ...(vad.enable && typeof vad.mode === 'number' && {RECOGNIZER_VAD_MODE: vad.mode}),
-    };
-
     if ('google' === vendor) {
-      const model = task.name === TaskName.Gather ? 'command_and_search' : 'latest_long';
+      const useV2 = rOpts.googleOptions?.serviceVersion === 'v2';
+      const model = task.name === TaskName.Gather ?
+        (useV2 ? 'telephony_short' : 'command_and_search') :
+        (useV2 ? 'long' : 'latest_long');
       opts = {
         ...opts,
         ...(sttCredentials && {GOOGLE_APPLICATION_CREDENTIALS: JSON.stringify(sttCredentials.credentials)}),
@@ -473,13 +521,34 @@ module.exports = (logger) => {
         ...(rOpts.hints?.length > 0 && typeof rOpts.hints[0] === 'object' &&
           {GOOGLE_SPEECH_HINTS: JSON.stringify(rOpts.hints)}),
         ...(typeof rOpts.hintsBoost === 'number' && {GOOGLE_SPEECH_HINTS_BOOST: rOpts.hintsBoost}),
-        ...(rOpts.altLanguages?.length > 0 &&
+        // When altLanguages is emptylist, we have to send value to freeswitch to clear the previous settings
+        ...(rOpts.altLanguages &&
           {GOOGLE_SPEECH_ALTERNATIVE_LANGUAGE_CODES: [...new Set(rOpts.altLanguages)].join(',')}),
         ...(rOpts.interactionType &&
           {GOOGLE_SPEECH_METADATA_INTERACTION_TYPE: rOpts.interactionType}),
         ...{GOOGLE_SPEECH_MODEL: rOpts.model || model},
         ...(rOpts.naicsCode > 0 && {GOOGLE_SPEECH_METADATA_INDUSTRY_NAICS_CODE: rOpts.naicsCode}),
         GOOGLE_SPEECH_METADATA_RECORDING_DEVICE_TYPE: 'phone_line',
+        ...(useV2 && {
+          GOOGLE_SPEECH_RECOGNIZER_PARENT: `projects/${sttCredentials.credentials.project_id}/locations/global`,
+          GOOGLE_SPEECH_CLOUD_SERVICES_VERSION: 'v2',
+          ...(rOpts.googleOptions?.speechStartTimeoutMs && {
+            GOOGLE_SPEECH_START_TIMEOUT_MS: rOpts.googleOptions.speechStartTimeoutMs
+          }),
+          ...(rOpts.googleOptions?.speechEndTimeoutMs && {
+            GOOGLE_SPEECH_END_TIMEOUT_MS: rOpts.googleOptions.speechEndTimeoutMs
+          }),
+          ...(rOpts.googleOptions?.transcriptNormalization && {
+            GOOGLE_SPEECH_TRANSCRIPTION_NORMALIZATION: JSON.stringify(rOpts.googleOptions.transcriptNormalization)
+          }),
+          ...(rOpts.googleOptions?.enableVoiceActivityEvents && {
+            GOOGLE_SPEECH_ENABLE_VOICE_ACTIVITY_EVENTS: rOpts.googleOptions.enableVoiceActivityEvents
+          }),
+          ...(rOpts.sgoogleOptions?.recognizerId) && {GOOGLE_SPEECH_RECOGNIZER_ID: rOpts.googleOptions.recognizerId},
+          ...(rOpts.googleOptions?.enableVoiceActivityEvents && {
+            GOOGLE_SPEECH_ENABLE_VOICE_ACTIVITY_EVENTS: rOpts.googleOptions.enableVoiceActivityEvents
+          }),
+        }),
       };
     }
     else if (['aws', 'polly'].includes(vendor)) {
@@ -489,9 +558,10 @@ module.exports = (logger) => {
         ...(rOpts.vocabularyFilterName && {AWS_VOCABULARY_FILTER_NAME: rOpts.vocabularyFilterName}),
         ...(rOpts.filterMethod && {AWS_VOCABULARY_FILTER_METHOD: rOpts.filterMethod}),
         ...(sttCredentials && {
-          AWS_ACCESS_KEY_ID: sttCredentials.accessKeyId,
-          AWS_SECRET_ACCESS_KEY: sttCredentials.secretAccessKey,
-          AWS_REGION: sttCredentials.region
+          ...(sttCredentials.accessKeyId && {AWS_ACCESS_KEY_ID: sttCredentials.accessKeyId}),
+          ...(sttCredentials.secretAccessKey && {AWS_SECRET_ACCESS_KEY: sttCredentials.secretAccessKey}),
+          AWS_REGION: sttCredentials.region,
+          ...(sttCredentials.sessionToken && {AWS_SESSION_TOKEN: sttCredentials.sessionToken}),
         }),
       };
     }
@@ -503,7 +573,8 @@ module.exports = (logger) => {
           {AZURE_SPEECH_HINTS: rOpts.hints.map((h) => h.trim()).join(',')}),
         ...(rOpts.hints?.length > 0 && typeof rOpts.hints[0] === 'object' &&
           {AZURE_SPEECH_HINTS: rOpts.hints.map((h) => h.phrase).join(',')}),
-        ...(rOpts.altLanguages && rOpts.altLanguages.length > 0 &&
+        // When altLanguages is emptylist, we have to send value to freeswitch to clear the previous settings
+        ...(rOpts.altLanguages &&
           {AZURE_SPEECH_ALTERNATIVE_LANGUAGE_CODES: [...new Set(rOpts.altLanguages)].join(',')}),
         ...(rOpts.requestSnr && {AZURE_REQUEST_SNR: 1}),
         ...(rOpts.profanityOption && {AZURE_PROFANITY_OPTION: rOpts.profanityOption}),
@@ -517,12 +588,19 @@ module.exports = (logger) => {
         ...{AZURE_USE_OUTPUT_FORMAT_DETAILED: 1},
         ...(azureOptions.speechSegmentationSilenceTimeoutMs &&
           {AZURE_SPEECH_SEGMENTATION_SILENCE_TIMEOUT_MS: azureOptions.speechSegmentationSilenceTimeoutMs}),
+        ...(azureOptions.languageIdMode &&
+          {AZURE_LANGUAGE_ID_MODE: azureOptions.languageIdMode}),
+        ...(azureOptions.postProcessing &&
+          {AZURE_POST_PROCESSING_OPTION: azureOptions.postProcessing}),
         ...(sttCredentials && {
           ...(sttCredentials.api_key && {AZURE_SUBSCRIPTION_KEY: sttCredentials.api_key}),
           ...(sttCredentials.region && {AZURE_REGION: sttCredentials.region}),
         }),
         ...(sttCredentials.use_custom_stt && sttCredentials.custom_stt_endpoint &&
           {AZURE_SERVICE_ENDPOINT_ID: sttCredentials.custom_stt_endpoint}),
+        //azureSttEndpointId overrides sttCredentials.custom_stt_endpoint
+        ...(rOpts.azureSttEndpointId &&
+          {AZURE_SERVICE_ENDPOINT_ID: rOpts.azureSttEndpointId}),
       };
     }
     else if ('nuance' === vendor) {
@@ -574,15 +652,24 @@ module.exports = (logger) => {
       };
     }
     else if ('deepgram' === vendor) {
+      let {model} = rOpts;
       const {deepgramOptions = {}} = rOpts;
+      const deepgramUri = deepgramOptions.deepgramSttUri || sttCredentials.deepgram_stt_uri;
+      const useTls = deepgramOptions.deepgramSttUseTls || sttCredentials.deepgram_stt_use_tls;
+
+      /* default to a sensible model if not supplied */
+      if (!model) {
+        model = selectDefaultDeepgramModel(task, language);
+      }
       opts = {
         ...opts,
+        DEEPGRAM_SPEECH_MODEL: model,
+        ...(deepgramUri && {DEEPGRAM_URI: deepgramUri}),
+        ...(deepgramUri && useTls && {DEEPGRAM_USE_TLS: 1}),
         ...(sttCredentials.api_key) &&
           {DEEPGRAM_API_KEY: sttCredentials.api_key},
         ...(deepgramOptions.tier) &&
           {DEEPGRAM_SPEECH_TIER: deepgramOptions.tier},
-        ...(deepgramOptions.model) &&
-          {DEEPGRAM_SPEECH_MODEL: deepgramOptions.model},
         ...(deepgramOptions.punctuate) &&
           {DEEPGRAM_SPEECH_ENABLE_AUTOMATIC_PUNCTUATION: 1},
         ...(deepgramOptions.smartFormatting) &&
@@ -612,7 +699,9 @@ module.exports = (logger) => {
         ...(deepgramOptions.keywords) &&
           {DEEPGRAM_SPEECH_KEYWORDS: deepgramOptions.keywords.join(',')},
         ...('endpointing' in deepgramOptions) &&
-          {DEEPGRAM_SPEECH_ENDPOINTING: deepgramOptions.endpointing},
+          {DEEPGRAM_SPEECH_ENDPOINTING: deepgramOptions.endpointing === false ? 'false' : deepgramOptions.endpointing,
+            // default DEEPGRAM_SPEECH_UTTERANCE_END_MS is 1000, will be override by user settings later if there is.
+            DEEPGRAM_SPEECH_UTTERANCE_END_MS: 1000},
         ...(deepgramOptions.utteranceEndMs) &&
           {DEEPGRAM_SPEECH_UTTERANCE_END_MS: deepgramOptions.utteranceEndMs},
         ...(deepgramOptions.vadTurnoff) &&
@@ -725,8 +814,26 @@ module.exports = (logger) => {
         ...(rOpts.hints?.length > 0 &&
           {ASSEMBLYAI_WORD_BOOST: JSON.stringify(rOpts.hints)})
       };
-    }
-    else if (vendor.startsWith('custom:')) {
+    } else if ('verbio' === vendor) {
+      const {verbioOptions = {}} = rOpts;
+      opts = {
+        ...opts,
+        ...(sttCredentials.access_token && { VERBIO_ACCESS_TOKEN: sttCredentials.access_token}),
+        ...(sttCredentials.engine_version && {VERBIO_ENGINE_VERSION: sttCredentials.engine_version}),
+        ...(language && {VERBIO_LANGUAGE: language}),
+        ...(verbioOptions.enable_formatting && {VERBIO_ENABLE_FORMATTING: verbioOptions.enable_formatting}),
+        ...(verbioOptions.enable_diarization && {VERBIO_ENABLE_DIARIZATION: verbioOptions.enable_diarization}),
+        ...(verbioOptions.topic && {VERBIO_TOPIC: verbioOptions.topic}),
+        ...(verbioOptions.inline_grammar && {VERBIO_INLINE_GRAMMAR: verbioOptions.inline_grammar}),
+        ...(verbioOptions.grammar_uri && {VERBIO_GRAMMAR_URI: verbioOptions.grammar_uri}),
+        ...(verbioOptions.label && {VERBIO_LABEL: verbioOptions.label}),
+        ...(verbioOptions.recognition_timeout && {VERBIO_RECOGNITION_TIMEOUT: verbioOptions.recognition_timeout}),
+        ...(verbioOptions.speech_complete_timeout &&
+          {VERBIO_SPEECH_COMPLETE_TIMEOUT: verbioOptions.speech_complete_timeout}),
+        ...(verbioOptions.speech_incomplete_timeout &&
+          {VERBIO_SPEECH_INCOMPLETE_TIMEOUT: verbioOptions.speech_incomplete_timeout}),
+      };
+    } else if (vendor.startsWith('custom:')) {
       let {options = {}} = rOpts;
       const {auth_token, custom_stt_url} = sttCredentials;
       options = {
@@ -740,7 +847,7 @@ module.exports = (logger) => {
 
       opts = {
         ...opts,
-        JAMBONZ_STT_API_KEY: auth_token,
+        ...(auth_token && {JAMBONZ_STT_API_KEY: auth_token}),
         JAMBONZ_STT_URL: custom_stt_url,
         ...(Object.keys(options).length > 0 && {JAMBONZ_STT_OPTIONS: JSON.stringify(options)}),
       };
@@ -752,48 +859,6 @@ module.exports = (logger) => {
     return opts;
   };
 
-  const removeSpeechListeners = (ep) => {
-    ep.removeCustomEventListener(GoogleTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(GoogleTranscriptionEvents.EndOfUtterance);
-    ep.removeCustomEventListener(GoogleTranscriptionEvents.VadDetected);
-
-    ep.removeCustomEventListener(AwsTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(AwsTranscriptionEvents.VadDetected);
-
-    ep.removeCustomEventListener(AzureTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(AzureTranscriptionEvents.NoSpeechDetected);
-    ep.removeCustomEventListener(AzureTranscriptionEvents.VadDetected);
-
-    ep.removeCustomEventListener(NuanceTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(NuanceTranscriptionEvents.TranscriptionComplete);
-    ep.removeCustomEventListener(NuanceTranscriptionEvents.StartOfSpeech);
-    ep.removeCustomEventListener(NuanceTranscriptionEvents.VadDetected);
-
-    ep.removeCustomEventListener(DeepgramTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(DeepgramTranscriptionEvents.Connect);
-    ep.removeCustomEventListener(DeepgramTranscriptionEvents.ConnectFailure);
-
-    ep.removeCustomEventListener(SonioxTranscriptionEvents.Transcription);
-
-    ep.removeCustomEventListener(CobaltTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(CobaltTranscriptionEvents.CompileContext);
-
-    ep.removeCustomEventListener(NvidiaTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(NvidiaTranscriptionEvents.TranscriptionComplete);
-    ep.removeCustomEventListener(NvidiaTranscriptionEvents.StartOfSpeech);
-    ep.removeCustomEventListener(NvidiaTranscriptionEvents.VadDetected);
-
-    ep.removeCustomEventListener(JambonzTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(JambonzTranscriptionEvents.Connect);
-    ep.removeCustomEventListener(JambonzTranscriptionEvents.ConnectFailure);
-
-    ep.removeCustomEventListener(JambonzTranscriptionEvents.Error);
-
-    ep.removeCustomEventListener(AssemblyAiTranscriptionEvents.Transcription);
-    ep.removeCustomEventListener(AssemblyAiTranscriptionEvents.Connect);
-    ep.removeCustomEventListener(AssemblyAiTranscriptionEvents.ConnectFailure);
-  };
-
   const setSpeechCredentialsAtRuntime = (recognizer) => {
     if (!recognizer) return;
     if (recognizer.vendor === 'nuance') {
@@ -832,7 +897,6 @@ module.exports = (logger) => {
   return {
     normalizeTranscription,
     setChannelVarsForStt,
-    removeSpeechListeners,
     setSpeechCredentialsAtRuntime,
     compileSonioxTranscripts,
     consolidateTranscripts

lib/utils/ws-requestor.js

@@ -9,7 +9,8 @@ const {
   JAMBONES_WS_PING_INTERVAL_MS,
   MAX_RECONNECTS,
   JAMBONES_WS_HANDSHAKE_TIMEOUT_MS,
-  JAMBONES_WS_MAX_PAYLOAD
+  JAMBONES_WS_MAX_PAYLOAD,
+  HTTP_USER_AGENT_HEADER
 } = require('../config');
 
 class WsRequestor extends BaseRequestor {
@@ -55,6 +56,12 @@ class WsRequestor extends BaseRequestor {
     }
 
     if (type === 'session:new') this.call_sid = params.callSid;
+    if (type === 'session:reconnect') {
+      this._reconnectPromise = new Promise((resolve, reject) => {
+        this._reconnectResolve = resolve;
+        this._reconnectReject = reject;
+      });
+    }
 
     /* if we have an absolute url, and it is http then do a standard webhook */
     if (this._isAbsoluteUrl(url) && url.startsWith('http')) {
@@ -70,20 +77,23 @@ class WsRequestor extends BaseRequestor {
     }
 
     /* connect if necessary */
+    const queueMsg = () => {
+      this.logger.debug(
+        `WsRequestor:request(${this.id}) - queueing ${type} message since we are connecting`);
+      if (wantsAck) {
+        const p = new Promise((resolve, reject) => {
+          this.queuedMsg.push({type, hook, params, httpHeaders, promise: {resolve, reject}});
+        });
+        return p;
+      }
+      else {
+        this.queuedMsg.push({type, hook, params, httpHeaders});
+      }
+      return;
+    };
     if (!this.ws) {
       if (this.connectInProgress) {
-        this.logger.debug(
-          `WsRequestor:request(${this.id}) - queueing ${type} message since we are connecting`);
-        if (wantsAck) {
-          const p = new Promise((resolve, reject) => {
-            this.queuedMsg.push({type, hook, params, httpHeaders, promise: {resolve, reject}});
-          });
-          return p;
-        }
-        else {
-          this.queuedMsg.push({type, hook, params, httpHeaders});
-        }
-        return;
+        return queueMsg();
       }
       this.connectInProgress = true;
       this.logger.debug(`WsRequestor:request(${this.id}) - connecting since we do not have a connection for ${type}`);
@@ -101,6 +111,10 @@ class WsRequestor extends BaseRequestor {
         return Promise.reject(err);
       }
     }
+    // If jambonz wait for ack from reconnect, queue the msg until reconnect is acked
+    if (type !== 'session:reconnect' && this._reconnectPromise) {
+      return queueMsg();
+    }
     assert(this.ws);
 
     /* prepare and send message */
@@ -118,7 +132,7 @@ class WsRequestor extends BaseRequestor {
       type,
       msgid,
       call_sid: this.call_sid,
-      hook: type === 'verb:hook' ? url : undefined,
+      hook: ['verb:hook', 'session:redirect'].includes(type) ? url : undefined,
       data: {...payload},
       ...b3
     };
@@ -138,6 +152,18 @@ class WsRequestor extends BaseRequestor {
       }
     };
 
+    const rejectQueuedMsgs = (err) => {
+      if (this.queuedMsg.length > 0) {
+        for (const {promise} of this.queuedMsg) {
+          this.logger.debug(`WsRequestor:request - preparing queued ${type} for rejectQueuedMsgs`);
+          if (promise) {
+            promise.reject(err);
+          }
+        }
+        this.queuedMsg.length = 0;
+      }
+    };
+
     //this.logger.debug({obj}, `websocket: sending (${url})`);
 
     /* special case: reconnecting before we received ack to session:new */
@@ -178,16 +204,37 @@ class WsRequestor extends BaseRequestor {
           this.logger.debug({response}, `WsRequestor:request ${url} succeeded in ${rtt}ms`);
           this.stats.histogram('app.hook.ws_response_time', rtt, ['hook_type:app']);
           resolve(response);
+          if (this._reconnectResolve) {
+            this._reconnectResolve();
+          }
         },
         failure: (err) => {
+          if (this._reconnectReject) {
+            this._reconnectReject(err);
+          }
           clearTimeout(timer);
           reject(err);
         }
       });
 
       /* send the message */
-      this.ws.send(JSON.stringify(obj), () => {
+      this.ws.send(JSON.stringify(obj), async() => {
         this.logger.debug({obj}, `WsRequestor:request websocket: sent (${url})`);
+        // If session:reconnect is waiting for ack, hold here until ack to send queuedMsgs
+        if (this._reconnectPromise) {
+          try {
+            await this._reconnectPromise;
+          } catch (err) {
+            // bad thing happened to session:recconnect
+            rejectQueuedMsgs(err);
+            this.emit('reconnect-error');
+            return;
+          } finally {
+            this._reconnectPromise = null;
+            this._reconnectResolve = null;
+            this._reconnectReject = null;
+          }
+        }
         sendQueuedMsgs();
       });
     });
@@ -228,6 +275,9 @@ class WsRequestor extends BaseRequestor {
         maxRedirects: 2,
         handshakeTimeout,
         maxPayload: JAMBONES_WS_MAX_PAYLOAD ? parseInt(JAMBONES_WS_MAX_PAYLOAD) : 24 * 1024,
+        headers: {
+          ...(HTTP_USER_AGENT_HEADER && {'user-agent' : HTTP_USER_AGENT_HEADER})
+        }
       };
       if (this.username && this.password) opts = {...opts, auth: `${this.username}:${this.password}`};
 
@@ -322,7 +372,9 @@ class WsRequestor extends BaseRequestor {
           'WsRequestor:_onSocketClosed time to reconnect');
         if (!this.ws && !this.connectInProgress) {
           this.connectInProgress = true;
-          this._connect().catch((err) => this.connectInProgress = false);
+          return this._connect()
+            .catch((err) => this.logger.error('WsRequestor:_onSocketClosed There is error while reconnect', err))
+            .finally(() => this.connectInProgress = false);
         }
       }, this.backoffMs);
       this.backoffMs = this.backoffMs < 2000 ? this.backoffMs * 2 : (this.backoffMs + 2000);
@@ -340,7 +392,9 @@ class WsRequestor extends BaseRequestor {
     /* messages must be JSON format */
     try {
       const obj = JSON.parse(content);
-      const {type, msgid, command, call_sid = this.call_sid, queueCommand = false, data} = obj;
+      //const {type, msgid, command, call_sid = this.call_sid, queueCommand = false, data} = obj;
+      const {type, msgid, command, queueCommand = false, data} = obj;
+      const call_sid = obj.callSid || this.call_sid;
 
       //this.logger.debug({obj}, 'WsRequestor:request websocket: received');
       assert.ok(type, 'type property not supplied');

package.json

@@ -1,9 +1,9 @@
 {
   "name": "jambonz-feature-server",
-  "version": "0.8.5",
+  "version": "0.9.0",
   "main": "app.js",
   "engines": {
-    "node": ">= 10.16.0"
+    "node": ">= 18.x"
   },
   "keywords": [
     "sip",
@@ -25,57 +25,57 @@
     "jslint:fix": "eslint app.js tracer.js lib --fix"
   },
   "dependencies": {
-    "@aws-sdk/client-auto-scaling": "^3.360.0",
-    "@aws-sdk/client-sns": "^3.360.0",
-    "@jambonz/db-helpers": "^0.9.1",
+    "@aws-sdk/client-auto-scaling": "^3.549.0",
+    "@aws-sdk/client-sns": "^3.549.0",
+    "@jambonz/db-helpers": "^0.9.6",
     "@jambonz/http-health-check": "^0.0.1",
-    "@jambonz/mw-registrar": "^0.2.4",
-    "@jambonz/realtimedb-helpers": "^0.8.7",
-    "@jambonz/speech-utils": "^0.0.31",
-    "@jambonz/stats-collector": "^0.1.9",
+    "@jambonz/mw-registrar": "^0.2.7",
+    "@jambonz/realtimedb-helpers": "^0.8.8",
+    "@jambonz/speech-utils": "^0.1.11",
+    "@jambonz/stats-collector": "^0.1.10",
     "@jambonz/time-series": "^0.2.8",
-    "@jambonz/verb-specifications": "^0.0.46",
-    "@opentelemetry/api": "^1.4.0",
-    "@opentelemetry/exporter-jaeger": "^1.9.0",
-    "@opentelemetry/exporter-trace-otlp-http": "^0.35.0",
-    "@opentelemetry/exporter-zipkin": "^1.9.0",
-    "@opentelemetry/instrumentation": "^0.35.0",
-    "@opentelemetry/resources": "^1.9.0",
-    "@opentelemetry/sdk-trace-base": "^1.9.0",
-    "@opentelemetry/sdk-trace-node": "^1.9.0",
-    "@opentelemetry/semantic-conventions": "^1.9.0",
+    "@jambonz/verb-specifications": "^0.0.74",
+    "@opentelemetry/api": "^1.8.0",
+    "@opentelemetry/exporter-jaeger": "^1.23.0",
+    "@opentelemetry/exporter-trace-otlp-http": "^0.50.0",
+    "@opentelemetry/exporter-zipkin": "^1.23.0",
+    "@opentelemetry/instrumentation": "^0.50.0",
+    "@opentelemetry/resources": "^1.23.0",
+    "@opentelemetry/sdk-trace-base": "^1.23.0",
+    "@opentelemetry/sdk-trace-node": "^1.23.0",
+    "@opentelemetry/semantic-conventions": "^1.23.0",
     "bent": "^7.3.12",
     "debug": "^4.3.4",
     "deepcopy": "^2.1.0",
-    "drachtio-fsmrf": "^3.0.28",
-    "drachtio-srf": "^4.5.31",
-    "express": "^4.18.2",
+    "drachtio-fsmrf": "^3.0.43",
+    "drachtio-srf": "^4.5.35",
+    "express": "^4.19.2",
     "express-validator": "^7.0.1",
-    "ip": "^1.1.8",
-    "moment": "^2.29.4",
-    "parse-url": "^8.1.0",
-    "pino": "^8.8.0",
+    "ip": "^2.0.1",
+    "moment": "^2.30.1",
+    "parse-url": "^9.2.0",
+    "pino": "^8.20.0",
     "polly-ssml-split": "^0.1.0",
     "proxyquire": "^2.1.3",
-    "sdp-transform": "^2.14.1",
-    "short-uuid": "^4.2.2",
-    "sinon": "^15.0.1",
+    "sdp-transform": "^2.14.2",
+    "short-uuid": "^5.1.0",
+    "sinon": "^17.0.1",
     "to-snake-case": "^1.0.0",
-    "undici": "^5.26.2",
+    "undici": "^6.19.2",
     "uuid-random": "^1.3.2",
     "verify-aws-sns-signature": "^0.1.0",
-    "ws": "^8.9.0",
+    "ws": "^8.17.1",
     "xml2js": "^0.6.2"
   },
   "devDependencies": {
     "clear-module": "^4.1.2",
-    "eslint": "^7.32.0",
-    "eslint-plugin-promise": "^4.3.1",
+    "eslint": "7.32.0",
+    "eslint-plugin-promise": "^6.1.1",
     "nyc": "^15.1.0",
-    "tape": "^5.6.1"
+    "tape": "^5.7.5"
   },
   "optionalDependencies": {
-    "bufferutil": "^4.0.6",
-    "utf-8-validate": "^5.0.8"
+    "bufferutil": "^4.0.8",
+    "utf-8-validate": "^6.0.3"
   }
 }

test/create-call-test.js

@@ -99,6 +99,8 @@ test('test create-call call-hook basic authentication', async(t) => {
     let obj = await getJSON(`http:127.0.0.1:3100/lastRequest/${from}`)
     t.ok(obj.headers.Authorization = 'Basic dXNlcm5hbWU6cGFzc3dvcmQ=',
       'create-call: call-hook contains basic authentication header');
+    t.ok(obj.headers['user-agent'] = 'jambonz',
+    'create-call: call-hook contains user-agent header');
     disconnect();
   } catch (err) {
     console.log(`error received: ${err}`);

test/docker-compose-testbed.yaml

@@ -42,7 +42,7 @@ services:
         ipv4_address: 172.38.0.7
 
   drachtio:
-    image: drachtio/drachtio-server:0.8.22
+    image: drachtio/drachtio-server:0.8.25-rc8
     restart: always
     command: drachtio --contact "sip:*;transport=udp" --mtu 4096 --address 0.0.0.0 --port 9022
     ports:
@@ -57,7 +57,7 @@ services:
         condition: service_healthy
 
   freeswitch:
-    image: drachtio/drachtio-freeswitch-mrf:0.4.33
+    image: drachtio/drachtio-freeswitch-mrf:0.7.3
     restart: always
     command: freeswitch --rtp-range-start 20000 --rtp-range-end 20100
     environment:

test/hangup-test.js

@@ -0,0 +1,53 @@
+const test = require('tape');
+const { sippUac } = require('./sipp')('test_fs');
+const clearModule = require('clear-module');
+const {provisionCallHook, provisionCustomHook} = require('./utils')
+const bent = require('bent');
+const getJSON = bent('json')
+
+process.on('unhandledRejection', (reason, p) => {
+  console.log('Unhandled Rejection at: Promise', p, 'reason:', reason);
+});
+
+function connect(connectable) {
+  return new Promise((resolve, reject) => {
+    connectable.on('connect', () => {
+      return resolve();
+    });
+  });
+}
+
+test('\'hangup\' custom headers', async(t) => {
+  clearModule.all();
+  const {srf, disconnect} = require('../app');
+
+  try {
+    await connect(srf);
+
+    // GIVEN
+    const verbs = [
+      {
+        verb: 'play',
+        url: 'https://example.com/example.mp3'
+      },
+      {
+        "verb": "hangup",
+        "headers": {
+          "X-Reason" : "maximum call duration exceeded"
+        }
+      }
+    ];
+
+    const from = 'hangup_custom_headers';
+    await provisionCallHook(from, verbs)
+
+    // THEN
+    await sippUac('uac-success-received-bye.xml', '172.38.0.10', from);
+    t.pass('play: succeeds when using single link');
+    disconnect();
+  } catch (err) {
+    console.log(`error received: ${err}`);
+    disconnect();
+    t.error(err);
+  }
+});

test/index.js

@@ -16,7 +16,8 @@ require('./listen-tests');
 require('./config-test');
 require('./queue-test');
 require('./in-dialog-test');
-require('./http-proxy-test');
+require('./hangup-test');
 require('./sdp-utils-test');
+require('./http-proxy-test');
 require('./remove-test-db');
 require('./docker_stop');

test/play-tests.js

@@ -188,7 +188,7 @@ test('\'play\' tests with seekOffset and actionHook', async(t) => {
     const seconds = parseInt(obj.body.playback_seconds);
     const milliseconds = parseInt(obj.body.playback_milliseconds);
     const lastOffsetPos = parseInt(obj.body.playback_last_offset_pos);
-    //console.log({obj}, 'lastRequest');
+    console.log({obj}, 'lastRequest');
     t.ok(obj.body.reason === "playCompleted", "play: actionHook success received");
     t.ok(seconds === 2, "playback_seconds: actionHook success received");
     t.ok(milliseconds === 2048, "playback_milliseconds: actionHook success received");

test/transcribe-tests.js

@@ -52,6 +52,7 @@ test('\'transcribe\' test - google', async(t) => {
     // THEN
     await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
     let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
     t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().startsWith('i\'d like to speak to customer support'),
       'transcribe: succeeds when using google credentials');
 
@@ -89,6 +90,7 @@ test('\'transcribe\' test - microsoft', async(t) => {
     // THEN
     await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
     let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
     t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().startsWith('i\'d like to speak to customer support'),
       'transcribe: succeeds when using  microsoft credentials');
 
@@ -126,6 +128,7 @@ test('\'transcribe\' test - aws', async(t) => {
     // THEN
     await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
     let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
     t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().startsWith('i\'d like to speak to customer support'),
       'transcribe: succeeds when using aws credentials');
 
@@ -155,6 +158,9 @@ test('\'transcribe\' test - deepgram config options', async(t) => {
         "recognizer": {
           "vendor": "deepgram",
           "language": "en-US",
+          "altLanguages": [
+            "en-US"
+          ],
           "deepgramOptions": {
             "model": "2-ea",
             "tier": "nova",
@@ -172,6 +178,9 @@ test('\'transcribe\' test - deepgram config options', async(t) => {
         "transcriptionHook": "/transcriptionHook",
         "recognizer": {
           "vendor": "deepgram",
+          "altLanguages": [
+            "en-AU"
+          ],
           "hints": ["customer support", "sales", "human resources", "HR"],
           "deepgramOptions": {
             "apiKey": DEEPGRAM_API_KEY,
@@ -184,6 +193,7 @@ test('\'transcribe\' test - deepgram config options', async(t) => {
     // THEN
     await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
     let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
     t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().includes('like to speak to customer support'),
       'transcribe: succeeds when using deepgram credentials');
 
@@ -224,6 +234,7 @@ test('\'transcribe\' test - deepgram', async(t) => {
     // THEN
     await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
     let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
     t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().includes('like to speak to customer support'),
       'transcribe: succeeds when using deepgram credentials');
 
@@ -303,9 +314,131 @@ test('\'transcribe\' test - google with asrTimeout', async(t) => {
     // THEN
     await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
     let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
     t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().startsWith('i\'d like to speak to customer support'),
       'transcribe: succeeds when using google credentials');
 
+    disconnect();
+  } catch (err) {
+    console.log(`error received: ${err}`);
+    disconnect();
+    t.error(err);
+  }
+});
+
+test('\'transcribe\' test - deepgram config options altLanguages', async(t) => {
+  if (!DEEPGRAM_API_KEY ) {
+    t.pass('skipping deepgram tests');
+    return t.end();
+  }
+  clearModule.all();
+  const {srf, disconnect} = require('../app');
+
+  try {
+    await connect(srf);
+    // GIVEN
+    let verbs = [
+      {
+        "verb": "config",
+        "recognizer": {
+          "vendor": "deepgram",
+          "language": "en-US",
+          "altLanguages": [
+            "en-US"
+          ],
+          "deepgramOptions": {
+            "model": "nova-2",
+            "numerals": true,
+            "ner": true,
+            "vadTurnoff": 10,
+            "keywords": [
+              "CPT"
+            ]
+          }
+        }
+      },
+      {
+        "verb": "transcribe",
+        "transcriptionHook": "/transcriptionHook",
+        "recognizer": {
+          "vendor": "deepgram",
+          "hints": ["customer support", "sales", "human resources", "HR"],
+          "deepgramOptions": {
+            "apiKey": DEEPGRAM_API_KEY,
+          }
+        }
+      }
+    ];
+    let from = "gather_success_no_altLanguages";
+    await provisionCallHook(from, verbs);
+    // THEN
+    await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
+    let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
+    t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().includes('like to speak to customer support'),
+      'transcribe: succeeds when using deepgram credentials');
+
+    disconnect();
+  } catch (err) {
+    console.log(`error received: ${err}`);
+    disconnect();
+    t.error(err);
+  }
+});
+
+test('\'transcribe\' test - deepgram config options altLanguages', async(t) => {
+  if (!DEEPGRAM_API_KEY ) {
+    t.pass('skipping deepgram tests');
+    return t.end();
+  }
+  clearModule.all();
+  const {srf, disconnect} = require('../app');
+
+  try {
+    await connect(srf);
+    // GIVEN
+    let verbs = [
+      {
+        "verb": "config",
+        "recognizer": {
+          "vendor": "deepgram",
+          "language": "en-US",
+          "altLanguages": [
+            "en-US"
+          ],
+          "deepgramOptions": {
+            "model": "nova-2",
+            "numerals": true,
+            "ner": true,
+            "vadTurnoff": 10,
+            "keywords": [
+              "CPT"
+            ]
+          }
+        }
+      },
+      {
+        "verb": "transcribe",
+        "transcriptionHook": "/transcriptionHook",
+        "recognizer": {
+          "vendor": "deepgram",
+          "hints": ["customer support", "sales", "human resources", "HR"],
+          "altLanguages": [],
+          "deepgramOptions": {
+            "apiKey": DEEPGRAM_API_KEY,
+          }
+        }
+      }
+    ];
+    let from = "gather_success_has_altLanguages";
+    await provisionCallHook(from, verbs);
+    // THEN
+    await sippUac('uac-gather-account-creds-success.xml', '172.38.0.10', from);
+    let obj = await getJSON(`http://127.0.0.1:3100/lastRequest/${from}_actionHook`);
+    //console.log(JSON.stringify(obj));
+    t.ok(obj.body.speech.alternatives[0].transcript.toLowerCase().includes('like to speak to customer support'),
+      'transcribe: succeeds when using deepgram credentials');
+
     disconnect();
   } catch (err) {
     console.log(`error received: ${err}`);