bump version

* feat/882: default model setting for en-IN language

* feat/882: refactored if into ||

.github/workflows/build.yml

@@ -6,12 +6,17 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: 20
       - run: npm ci
       - run: npm run jslint
+      - name: Install Docker Compose
+        run: |
+          sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
+          sudo chmod +x /usr/local/bin/docker-compose
+          docker-compose --version
       - run: docker pull drachtio/sipp
       - run: npm test
         env:

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

README.md

@@ -21,6 +21,7 @@ Configuration is provided via environment variables:
 |ENCRYPTION_SECRET| secret for credential encryption(JWT_SECRET is deprecated) |yes|
 |GOOGLE_APPLICATION_CREDENTIALS| path to gcp service key file|yes|
 |HTTP_PORT| tcp port to listen on for API requests from jambonz-api-server|yes|
+|HTTP_IP| IP Address for API requests from jambonz-api-server |no|
 |JAMBONES_GATHER_EARLY_HINTS_MATCH| if true and hints are provided, gather will opportunistically review interim transcripts if possible to reduce ASR latency |no|
 |JAMBONES_FREESWITCH| IP:port:secret for Freeswitch server (e.g. '127.0.0.1:8021:JambonzR0ck$'|yes|
 |JAMBONES_LOGLEVEL| log level for application, 'info' or 'debug'|no|

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

@@ -73,6 +73,7 @@ const JAMBONES_LOGLEVEL = process.env.JAMBONES_LOGLEVEL || 'info';
 const JAMBONES_INJECT_CONTENT = process.env.JAMBONES_INJECT_CONTENT;
 
 const PORT = parseInt(process.env.HTTP_PORT, 10) || 3000;
+const HTTP_IP = process.env.HTTP_IP;
 const HTTP_PORT_MAX = parseInt(process.env.HTTP_PORT_MAX, 10);
 
 const K8S = process.env.K8S;
@@ -170,6 +171,7 @@ module.exports = {
   JAMBONES_CLUSTER_ID,
   PORT,
   HTTP_PORT_MAX,
+  HTTP_IP,
   K8S,
   K8S_SBC_SIP_SERVICE_NAME,
   JAMBONES_SUBNET,

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/http-routes/api/create-call.js

@@ -97,7 +97,8 @@ router.post('/',
         'X-Trace-ID': rootSpan.traceId,
         ...(req.body?.application_sid && {'X-Application-Sid': req.body.application_sid}),
         ...(restDial.fromHost && {'X-Preferred-From-Host': restDial.fromHost}),
-        ...(record_all_calls && {'X-Record-All-Calls': recordOutputFormat})
+        ...(record_all_calls && {'X-Record-All-Calls': recordOutputFormat}),
+        ...target.headers
       };
 
       switch (target.type) {
@@ -218,7 +219,7 @@ router.post('/',
       }
       if (!app.notifier && app.call_status_hook) {
         app.notifier = new HttpRequestor(logger, account.account_sid, app.call_status_hook, account.webhook_secret);
-        logger.debug({call_hook: app.call_hook}, 'creating http client for call status hook');
+        logger.debug({call_status_hook: app.call_status_hook}, 'creating http client for call status hook');
       }
       else if (!app.notifier) {
         logger.debug('creating null call status hook');

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];
@@ -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 +352,17 @@ 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) {
+        const {direction, callerName, from, to, originatingSipIp, originatingSipTrunkName} = app.callInfo;
+        req.locals.callInfo.direction = direction;
+        req.locals.callInfo.callerName = callerName;
+        req.locals.callInfo.from = from;
+        req.locals.callInfo.to = to;
+        req.locals.callInfo.originatingSipIp = originatingSipIp;
+        req.locals.callInfo.originatingSipTrunkName = originatingSipTrunkName;
+        delete app.callInfo;
+      }
       next();
     } catch (err) {
       span.end();

lib/session/call-session.js

@@ -19,6 +19,7 @@ const { normalizeJambones } = require('@jambonz/verb-specifications');
 const listTaskNames = require('../utils/summarize-tasks');
 const HttpRequestor = require('../utils/http-requestor');
 const WsRequestor = require('../utils/ws-requestor');
+const ActionHookDelayProcessor = require('../utils/action-hook-delay');
 const {
   JAMBONES_INJECT_CONTENT,
   JAMBONES_EAGERLY_PRE_CACHE_AUDIO,
@@ -115,6 +116,7 @@ class CallSession extends Emitter {
       this.logger.debug(`CallSession: ${this.callSid} listener count ${this.requestor.listenerCount('command')}`);
       this.requestor.on('connection-dropped', this._onWsConnectionDropped.bind(this));
       this.requestor.on('handover', handover.bind(this));
+      this.requestor.on('reconnect-error', this._onSessionReconnectError.bind(this));
     };
 
     if (!this.isConfirmCallSession) {
@@ -122,6 +124,7 @@ class CallSession extends Emitter {
       this.logger.debug(`CallSession: ${this.callSid} listener count ${this.requestor.listenerCount('command')}`);
       this.requestor.on('connection-dropped', this._onWsConnectionDropped.bind(this));
       this.requestor.on('handover', handover.bind(this));
+      this.requestor.on('reconnect-error', this._onSessionReconnectError.bind(this));
     }
   }
 
@@ -193,6 +196,24 @@ class CallSession extends Emitter {
     this._synthesizer = synth;
   }
 
+  /**
+   * ASR TTS fallback
+   */
+  get hasFallbackAsr() {
+    return this._hasFallbackAsr || false;
+  }
+
+  set hasFallbackAsr(i) {
+    this._hasFallbackAsr = i;
+  }
+
+  get hasFallbackTts() {
+    return this._hasFallbackTts || false;
+  }
+
+  set hasFallbackTts(i) {
+    this._hasFallbackTts = i;
+  }
   /**
    * default vendor to use for speech synthesis if not provided in the app
    */
@@ -318,6 +339,17 @@ class CallSession extends Emitter {
     this.application.fallback_speech_recognizer_language = language;
   }
 
+  /**
+   * Vad
+   */
+  get vad() {
+    return this._vad;
+  }
+
+  set vad(v) {
+    this._vad = v;
+  }
+
   /**
    * indicates whether the call currently in progress
    */
@@ -488,14 +520,78 @@ class CallSession extends Emitter {
     this._actionHookDelayRetries = e;
   }
 
-  get actionHookDelayActions() {
+  // Getter/setter for current tts vendor
-    return this._actionHookDelayActions;
+  get currentTtsVendor() {
+    return this._currentTtsVendor;
   }
 
-  set actionHookDelayActions(e) {
+  set currentTtsVendor(vendor) {
-    this._actionHookDelayActions = e;
+    this._currentTtsVendor = vendor;
   }
 
+  get actionHookDelayProcessor() {
+    return this._actionHookDelayProcessor;
+  }
+
+  set actionHookDelayProperties(opts) {
+    if (this._actionHookDelayProcessor) {
+      this._actionHookDelayProcessor.stop();
+      if (!this._actionHookDelayProcessor.init(opts)) {
+        this._actionHookDelayProcessor.removeAllListeners();
+        this._actionHookDelayProcessor = null;
+      }
+    }
+    else {
+      try {
+        this._actionHookDelayProcessor = new ActionHookDelayProcessor(this.logger, opts, this, this.ep);
+        this._actionHookDelayProcessor.on('giveup', () => {
+          this.logger.info('CallSession: ActionHookDelayProcessor: giveup event - hanging up call');
+          this._jambonzHangup();
+          if (this.wakeupResolver) {
+            this.logger.debug('CallSession: Giveup timer expired - waking up');
+            this.wakeupResolver({reason: 'noResponseGiveUp'});
+            this.wakeupResolver = null;
+          }
+        });
+      } catch (err) {
+        this.logger.error({err}, 'CallSession: Error creating ActionHookDelayProcessor');
+      }
+    }
+  }
+
+  async clearOrRestoreActionHookDelayProcessor() {
+    if (this._actionHookDelayProcessor) {
+      await this._actionHookDelayProcessor.stop();
+      if (!this.popActionHookDelayProperties()) {
+        //this.logger.debug('CallSession:clearOrRestoreActionHookDelayProcessor - ahd settings');
+        //await this.clearActionHookDelayProcessor();
+      }
+      this.logger.debug('CallSession:clearOrRestoreActionHookDelayProcessor - say or play action completed');
+    }
+  }
+
+  async clearActionHookDelayProcessor() {
+    if (this._actionHookDelayProcessor) {
+      await this._actionHookDelayProcessor.stop();
+      this._actionHookDelayProcessor.removeAllListeners();
+      this._actionHookDelayProcessor = null;
+    }
+  }
+
+  stashActionHookDelayProperties() {
+    this._storedActionHookDelayProperties = this._actionHookDelayProcessor.properties;
+  }
+
+  popActionHookDelayProperties() {
+    if (this._storedActionHookDelayProperties) {
+      this._actionHookDelayProcessor.init(this._storedActionHookDelayProperties);
+      this._storedActionHookDelayProperties = null;
+      return true;
+    }
+    return false;
+  }
+
+
   hasGlobalSttPunctuation() {
     return this._globalSttPunctuation !== undefined;
   }
@@ -702,7 +798,7 @@ class CallSession extends Emitter {
       task = await this.backgroundTaskManager.newTask('bargeIn', gather);
       task.sticky = autoEnable;
       // listen to the bargein-done from background manager
-      this.backgroundTaskManager.once('bargeIn-done', () => {
+      this.backgroundTaskManager.on('bargeIn-done', () => {
         if (this.requestor instanceof WsRequestor) {
           try {
             this.kill(true);
@@ -775,7 +871,8 @@ class CallSession extends Emitter {
             writeAlerts({
               alert_type: AlertType.TTS_FAILURE,
               account_sid: this.accountSid,
-              vendor
+              vendor,
+              target_sid: this.callSid
             }).catch((err) => this.logger.error({err}, 'Error writing tts alert'));
           }
         }
@@ -784,6 +881,7 @@ class CallSession extends Emitter {
             speech_credential_sid: credential.speech_credential_sid,
             accessKeyId: credential.access_key_id,
             secretAccessKey: credential.secret_access_key,
+            roleArn: credential.role_arn,
             region: credential.aws_region || AWS_REGION
           };
         }
@@ -820,6 +918,7 @@ class CallSession extends Emitter {
             speech_credential_sid: credential.speech_credential_sid,
             api_key: credential.api_key,
             deepgram_stt_uri: credential.deepgram_stt_uri,
+            deepgram_tts_uri: credential.deepgram_tts_uri,
             deepgram_stt_use_tls: credential.deepgram_stt_use_tls
           };
         }
@@ -862,6 +961,12 @@ class CallSession extends Emitter {
             voice_engine: credential.voice_engine,
             options: credential.options
           };
+        } else if ('rimelabs' === vendor) {
+          return {
+            api_key: credential.api_key,
+            model_id: credential.model_id,
+            options: credential.options
+          };
         } else if ('assemblyai' === vendor) {
           return {
             speech_credential_sid: credential.speech_credential_sid,
@@ -872,6 +977,12 @@ class CallSession extends Emitter {
             api_key: credential.api_key,
             model_id: credential.model_id
           };
+        }  else if ('verbio' === vendor) {
+          return {
+            client_id: credential.client_id,
+            client_secret: credential.client_secret,
+            engine_version: credential.engine_version
+          };
         } else if (vendor.startsWith('custom:')) {
           return {
             speech_credential_sid: credential.speech_credential_sid,
@@ -885,7 +996,8 @@ class CallSession extends Emitter {
         writeAlerts({
           alert_type: AlertType.STT_NOT_PROVISIONED,
           account_sid: this.accountSid,
-          vendor
+          vendor,
+          target_sid: this.callSid
         }).catch((err) => this.logger.error({err}, 'Error writing tts alert'));
       }
     }
@@ -909,7 +1021,6 @@ class CallSession extends Emitter {
       task.on('VerbHookSpanWaitForEnd', ({span}) => {
         this.verbHookSpan = span;
       });
-      task.on('ActionHookDelayActionOptions', this._onActionHookDelayActions.bind(this));
       try {
         const resources = await this._evaluatePreconditions(task);
         let skip = false;
@@ -955,6 +1066,15 @@ class CallSession extends Emitter {
       ) {
         try {
           await this._awaitCommandsOrHangup();
+
+          //await this.clearOrRestoreActionHookDelayProcessor();
+
+          //TODO: remove filler noise code and simply create as action hook delay
+          if (this._isPlayingFillerNoise) {
+            this._isPlayingFillerNoise = false;
+            this.ep.api('uuid_break', this.ep.uuid)
+              .catch((err) => this.logger.info(err, 'Error killing filler noise'));
+          }
           if (this.callGone) break;
         } catch (err) {
           this.logger.info(err, 'CallSession:exec - error waiting for new commands');
@@ -1180,9 +1300,8 @@ class CallSession extends Emitter {
       this.currentTask.kill(this);
     }
     this._endVerbHookSpan();
-    // clear all delay action hook timeout if there is
+
-    this._clearActionHookNoResponseGiveUpTimer();
+    await this.clearOrRestoreActionHookDelayProcessor();
-    this._clearActionHookNoResponseTimer();
   }
 
   /**
@@ -1241,7 +1360,7 @@ class CallSession extends Emitter {
   async _lccConferenceParticipantAction(opts) {
     const task = this.currentTask;
     if (!task || TaskName.Conference !== task.name || !this.isInConference) {
-      return this.logger.info('CallSession:_lccConferenceParticipantState - invalid cmd, call is not in conference');
+      return this.logger.info('CallSession:_lccConferenceParticipantAction - invalid cmd, call is not in conference');
     }
     task.doConferenceParticipantAction(this, opts);
   }
@@ -1493,7 +1612,7 @@ Duration=${duration} `
       return this._lccTag(opts);
     }
     else if (opts.conferenceParticipantAction) {
-      return this._lccConferenceParticipantState(opts);
+      return this._lccConferenceParticipantAction(opts.conferenceParticipantAction);
     }
     else if (opts.dub) {
       return this._lccDub(opts);
@@ -1592,7 +1711,23 @@ Duration=${duration} `
   }
 
   _preCacheAudio(newTasks) {
-    for (const task of newTasks) {
+    /**
+     * only precache audio for the a queued say if we have one or more non-Config verbs
+     * ahead of it in the queue.  This is because the Config verb returns immediately
+     * and would not give us enough time to generate the audio.  The point of precaching
+     * is to take advantage of getting the audio in advance of being needed, so we need
+     * to be confident we have some time before the say verb is executed, and the Config
+     * does not give us that confidence since it returns immediately.
+     */
+    const haveQueuedNonConfig = this.tasks.findIndex((t) => t.name !== TaskName.Config) !== -1;
+    let tasks = haveQueuedNonConfig ? newTasks : [];
+    if (!haveQueuedNonConfig) {
+      const idxFirstNotConfig = newTasks.findIndex((t) => t.name !== TaskName.Config);
+      if (-1 === idxFirstNotConfig) return;
+      tasks = newTasks.slice(idxFirstNotConfig + 1);
+    }
+
+    for (const task of tasks) {
       if (task.name === TaskName.Config && task.hasSynthesizer) {
         /* if they change synthesizer settings don't try to precache */
         break;
@@ -1664,7 +1799,24 @@ Duration=${duration} `
     }, 'CallSession:_injectTasks - completed');
   }
 
-  _onCommand({msgid, command, call_sid, queueCommand, data}) {
+  async _onSessionReconnectError(err) {
+    const {writeAlerts, AlertType} = this.srf.locals;
+    const sid = this.accountInfo.account.account_sid;
+    this.logger.info({err}, `_onSessionReconnectError for account ${sid}`);
+    try {
+      await writeAlerts({
+        alert_type: AlertType.WEBHOOK_CONNECTION_FAILURE,
+        account_sid: this.accountSid,
+        detail: `Session:reconnect error ${err}`,
+        url: this.application.call_hook.url,
+      });
+    } catch (error) {
+      this.logger.error({error}, 'Error writing WEBHOOK_CONNECTION_FAILURE alert');
+    }
+    this._jambonzHangup();
+  }
+
+  async _onCommand({msgid, command, call_sid, queueCommand, data}) {
     this.logger.info({msgid, command, queueCommand, data}, 'CallSession:_onCommand - received command');
     let resolution;
     switch (command) {
@@ -1689,9 +1841,9 @@ Duration=${duration} `
           }
           resolution = {reason: 'received command, new tasks', queue: queueCommand, command};
           resolution.command = listTaskNames(t);
+
           // clear all delay action hook timeout if there is
-          this._clearActionHookNoResponseGiveUpTimer();
+          await this.clearOrRestoreActionHookDelayProcessor();
-          this._clearActionHookNoResponseTimer();
         }
         else this._lccCallHook(data);
         break;
@@ -1844,7 +1996,7 @@ Duration=${duration} `
       });
       //ep.cs = this;
       this.ep = ep;
-      this.logger.debug(`allocated endpoint ${ep.uuid}`);
+      this.logger.info(`allocated endpoint ${ep.uuid}`);
 
       this._configMsEndpoint();
 
@@ -1917,6 +2069,12 @@ Duration=${duration} `
       this.logger.error('CallSession:replaceEndpoint cannot be called without stable dlg');
       return;
     }
+    // When this call kicked out from conference, session need to replace endpoint
+    // but this.ms might be undefined/null at this case.
+    this.ms = this.ms || this.getMS();
+    // Destroy previous ep if it's still running.
+    if (this.ep?.connected) this.ep.destroy();
+
     this.ep = await this.ms.createEndpoint({remoteSdp: this.dlg.remote.sdp});
     this._configMsEndpoint();
 
@@ -1951,13 +2109,13 @@ Duration=${duration} `
     this.rootSpan && this.rootSpan.end();
     // close all background tasks
     this.backgroundTaskManager.stopAll();
-    this._clearActionHookNoResponseGiveUpTimer();
+    this.clearOrRestoreActionHookDelayProcessor().catch((err) => {});
-    this._clearActionHookNoResponseTimer();
   }
 
   /**
    * called when the caller has hung up.  Provided for subclasses to override
    * in order to apply logic at this point if needed.
+   * return true if success fallback, return false if not
    */
   _callerHungup() {
     assert(false, 'subclass responsibility to override this method');
@@ -2359,6 +2517,30 @@ Duration=${duration} `
     return new Promise((resolve, reject) => {
       this.logger.info('_awaitCommandsOrHangup - waiting...');
       this.wakeupResolver = resolve;
+
+      if (this._actionHookDelayProcessor) {
+        this._actionHookDelayProcessor.start();
+      }
+
+      /**
+       * TODO: filler noise can be handled as an ActionHookDelayProcessor -
+       * it's just one specific scenario for action hook delay -
+       * remove the code below and simply implement filler noise as an action hook delay
+       */
+
+      /* start filler noise if configured while we wait for new commands */
+      if (this.fillerNoise?.url && this.ep?.connected && !this.ep2) {
+        this.logger.debug('CallSession:_awaitCommandsOrHangup - playing filler noise');
+        this._isPlayingFillerNoise = true;
+        this.ep.play(this.fillerNoise.url);
+        this.ep.once('playback-start', (evt) => {
+          if (evt.file === this.fillerNoise.url && !this._isPlayingFillerNoise) {
+            this.logger.info('CallSession:_awaitCommandsOrHangup - filler noise started');
+            this.ep.api('uuid_break', this.ep.uuid)
+              .catch((err) => this.logger.info(err, 'Error killing filler noise'));
+          }
+        });
+      }
     });
   }
 
@@ -2390,69 +2572,6 @@ Duration=${duration} `
       this.verbHookSpan = null;
     }
   }
-  // actionHook delay actions
-  _onActionHookDelayActions(options) {
-    this._actionHookDelayRetryCount = 0;
-    this._startActionHookNoResponseTimer(options);
-    this._startActionHookNoResponseGiveUpTimer(options);
-  }
-
-  _startActionHookNoResponseTimer(options) {
-    this._clearActionHookNoResponseTimer();
-    if (options.noResponseTimeoutMs) {
-      this.logger.debug(`CallSession:_startActionHookNoResponseTimer ${options.noResponseTimeoutMs}`);
-      this._actionHookNoResponseTimer = setTimeout(() => {
-        if (this._actionHookDelayRetryCount >= options.retries) {
-          this._jambonzHangup();
-        }
-        const verb = options.actions[this._actionHookDelayRetryCount % options.actions.length];
-        // Inject verb to main stack
-        const t = normalizeJambones(this.logger, [verb])
-          .map((tdata) => makeTask(this.logger, tdata));
-        if (t.length) {
-          t[0].on('playDone', (err) => {
-            if (err) this.logger.error({err}, `Call-Session:exec Error delay action, play ${verb}`);
-            this._startActionHookNoResponseTimer(options);
-          });
-        }
-        this.tasks.push(...t);
-        if (this.wakeupResolver) {
-          this.wakeupResolver({reason: 'actionHook no response, applied delay actions', verb});
-          this.wakeupResolver = null;
-        }
-
-        this.logger.debug(`CallSession:_startActionHookNoResponseTimer, executing verb ${JSON.stringify(verb)}`);
-
-        this._actionHookDelayRetryCount++;
-      }, options.noResponseTimeoutMs);
-    }
-  }
-
-  _clearActionHookNoResponseTimer() {
-    if (this._actionHookNoResponseTimer) {
-      clearTimeout(this._actionHookNoResponseTimer);
-    }
-    this._actionHookNoResponseTimer = null;
-  }
-
-  _startActionHookNoResponseGiveUpTimer(options) {
-    this._clearActionHookNoResponseGiveUpTimer();
-    if (options.noResponseGiveUpTimeoutMs) {
-      this.logger.debug(`CallSession:_startActionHookNoResponseGiveUpTimer ${options.noResponseGiveUpTimeoutMs}`);
-      this._actionHookNoResponseGiveUpTimer = setTimeout(() => {
-        this.logger.debug('CallSession:_startActionHookNoResponseGiveUpTimer Timeout');
-        this._jambonzHangup();
-        this._actionHookNoResponseGiveUpTimer = null;
-      }, options.noResponseGiveUpTimeoutMs);
-    }
-  }
-
-  _clearActionHookNoResponseGiveUpTimer() {
-    if (this._actionHookNoResponseGiveUpTimer) {
-      clearTimeout(this._actionHookNoResponseGiveUpTimer);
-    }
-    this._actionHookNoResponseGiveUpTimer = null;
-  }
 }
 
 module.exports = CallSession;

lib/session/inbound-call-session.js

@@ -71,7 +71,7 @@ class InboundCallSession extends CallSession {
   }
 
   _jambonzHangup() {
-    this._hangup();
+    this.dlg?.destroy();
   }
 
   _hangup(terminatedBy = 'jambonz') {
@@ -79,6 +79,7 @@ class InboundCallSession extends CallSession {
       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 ${terminatedBy}`});
@@ -87,7 +88,6 @@ class InboundCallSession extends CallSession {
       callStatus: CallStatus.Completed,
       duration
     });
-    this.logger.info(`InboundCallSession: ${terminatedBy} 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
@@ -42,9 +45,63 @@ class RestCallSession extends CallSession {
   setDialog(dlg) {
     this.dlg = dlg;
     dlg.on('destroy', this._callerHungup.bind(this));
+    dlg.on('refer', this._onRefer.bind(this));
+    dlg.on('modify', this._onReinvite.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.
    */
@@ -56,7 +113,7 @@ class RestCallSession extends CallSession {
     this._hangup();
   }
 
-  _hangup(terminatedBy = 'jamboz') {
+  _hangup(terminatedBy = 'jambonz') {
     if (this.restDialTask) {
       this.restDialTask.turnOffAmd();
     }

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) {
@@ -115,7 +118,9 @@ class Conference extends Task {
     this.emitter.emit('kill');
     await this._doFinalMemberCheck(cs);
     if (this.ep && this.ep.connected) {
-      this.ep.conn.removeAllListeners('esl::event::CUSTOM::*');
+      // drachtio-fsmrf override esl::event::CUSTOM to conference join listerner, After finish the conference
+      // the application need to reset the esl::event::CUSTOM for another use on the same endpoint
+      this.ep.resetEslCustomEvent();
       this.ep.api(`conference ${this.confName} kick ${this.memberId}`)
         .catch((err) => this.logger.info({err}, 'Error kicking participant'));
     }
@@ -132,15 +137,10 @@ class Conference extends Task {
    * @param {SipDialog} dlg
    */
   async _init(cs, dlg) {
-    const friendlyName = this.confName;
     const {createHash, retrieveHash} = cs.srf.locals.dbHelpers;
+    this.friendlyName = this.confName;
     this.confName = `conf:${cs.accountSid}:${this.confName}`;
 
-    this.statusParams = Object.assign({
-      conferenceSid: this.confName,
-      friendlyName
-    }, cs.callInfo);
-
     // check if conference is in progress
     const obj = await retrieveHash(this.confName);
     if (obj) {
@@ -348,7 +348,9 @@ class Conference extends Task {
       Object.assign(opts, {flags: {
         ...(this.endConferenceOnExit && {endconf: true}),
         ...(this.startConferenceOnEnter && {moderator: true}),
-        ...((this.joinMuted || this.data.speakOnlyTo) && {joinMuted: true}),
+        //https://developer.signalwire.com/freeswitch/FreeSWITCH-Explained/Modules/mod_conference_3965534/
+        // mute |	Enter conference muted
+        ...((this.joinMuted || this.speakOnlyTo) && {mute: true}),
       }});
 
       /**
@@ -361,7 +363,7 @@ class Conference extends Task {
     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
@@ -395,8 +397,8 @@ class Conference extends Task {
           .catch((err) => {});
       }
 
-      if (this.data.speakOnlyTo) {
+      if (this.speakOnlyTo) {
-        this.setCoachMode(this.data.speakOnlyTo);
+        this.setCoachMode(this.speakOnlyTo);
       }
     } catch (err) {
       this.logger.error(err, `Failed to join conference ${this.confName}`);
@@ -488,7 +490,7 @@ class Conference extends Task {
   }
 
   async doConferenceParticipantAction(cs, opts) {
-    const {action, tag} = opts;
+    const {action, tag, wait_hook } = opts;
 
     switch (action) {
       case 'tag':
@@ -504,7 +506,10 @@ class Conference extends Task {
         await this.clearCoachMode();
         break;
       case 'hold':
-        this.doConferenceHold(cs, {conf_hold_status: 'hold'});
+        this.doConferenceHold(cs, {
+          conf_hold_status: 'hold',
+          ...(wait_hook && {wait_hook})
+        });
         break;
       case 'unhold':
         this.doConferenceHold(cs, {conf_hold_status: 'unhold'});
@@ -515,8 +520,11 @@ class Conference extends Task {
       case 'unmute':
         this.doConferenceMute(cs, {conf_mute_status: 'unmute'});
         break;
+      case 'kick':
+        this.kickMember(cs);
+        break;
       default:
-        this.logger.info(`Conference:doConferenceParticipantState - unhandled action ${action}`);
+        this.logger.info(`Conference:doConferenceParticipantAction - unhandled action ${action}`);
         break;
     }
   }
@@ -538,6 +546,13 @@ class Conference extends Task {
     } while (!this.killed && this.conf_hold_status === 'hold');
   }
 
+  /**
+   * mute or unmute side of the call
+   */
+  mute(callSid, doMute) {
+    this.doConferenceMute(this.callSession, {conf_mute_status: doMute});
+  }
+
   /**
    * Add ourselves to the waitlist of sessions to be notified once
    * the conference starts
@@ -567,7 +582,7 @@ 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 } ;
@@ -586,7 +601,7 @@ 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');
     }
@@ -596,7 +611,7 @@ class Conference extends Task {
      * when we hang up as the last member, the current member count = 1
      * when we are kicked out of the call when the moderator leaves, the member count = 0
      */
-    if (this.participantCount === 0) {
+    if (this.participantCount === 0 || this.endConferenceOnExit) {
       const {deleteKey} = cs.srf.locals.dbHelpers;
       try {
         this._notifyConferenceEvent(cs, 'end');
@@ -604,7 +619,8 @@ class Conference extends Task {
         this.logger.info(`conf ${this.confName} deprovisioned: ${removed ? 'success' : 'failure'}`);
       }
       catch (err) {
-        this.logger.error(err, `Error deprovisioning conference ${this.confName}`);
+        this.logger.error(err, `Error deprovisioning conference ${this.confName},
+          might be the conference already cleaned by another moderator`);
       }
     }
   }
@@ -681,8 +697,24 @@ class Conference extends Task {
       if (!params.time) params.time = (new Date()).toISOString();
       if (!params.members && typeof this.participantCount === 'number') params.members = this.participantCount;
       cs.application.requestor
-        .request('verb:hook', this.statusHook, Object.assign(params, this.statusParams, httpHeaders))
+        .request(
-        .catch((err) => this.logger.info(err, 'Conference:notifyConferenceEvent - error'));
+          'verb:hook',
+          this.statusHook,
+          Object.assign(
+            params,
+            Object.assign(
+              {
+                conferenceSid: this.confName,
+                friendlyName: this.friendlyName,
+              },
+              cs.callInfo.toJSON()
+            ),
+            httpHeaders
+          )
+        )
+        .catch((err) =>
+          this.logger.info(err, 'Conference:notifyConferenceEvent - error')
+        );
     }
   }
 
@@ -699,7 +731,12 @@ class Conference extends Task {
 
   // conference event handlers
   _onAddMember(logger, cs, evt) {
-    logger.debug({evt}, `Conference:_onAddMember - member added to conference ${this.confName}`);
+    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')) ;
@@ -734,28 +771,64 @@ 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 response = await this.ep.api('conference', [this.confName, 'gettag', speakOnlyTo, 'nomatch']);
+      const members = (await this.ep.getNonMatchingConfParticipants(this.confName, speakOnlyTo))
-      this.logger.info(`Conference:_setCoachMode: my audio will only be sent to particpants ${response}`);
+        .filter((m) => m !== this.memberId);
-      await this.ep.api('conference', [this.confName, 'relate', this.memberId, response, 'nospeak']);
+      if (members.length === 0) {
-      this.speakOnlyTo = speakOnlyTo;
+        this.logger.info({members}, 'Conference:_setCoachMode: all participants have the tag, so all will hear me');
-      this.coaching = response;
+        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) {
+      if (this.coaching.length === 0) {
         this.logger.info('Conference:_clearCoachMode: no coaching mode to clear');
-        return;
       }
-      this.logger.info(`Conference:_clearCoachMode: now sending my audio to all, including ${this.coaching}`);
+      else {
-      await this.ep.api('conference', [this.confName, 'relate', this.memberId, this.coaching, 'clear']);
+        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 = null;
+      this.coaching = [];
     } catch (err) {
       this.logger.error({err}, '_clearCoachMode: Error');
     }
@@ -781,6 +854,16 @@ class Conference extends Task {
     }
   }
 
+  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

@@ -15,7 +15,8 @@ class TaskConfig extends Task {
       'transcribe',
       'fillerNoise',
       'actionHookDelayAction',
-      'boostAudioSignal'
+      'boostAudioSignal',
+      'vad'
     ].forEach((k) => this[k] = this.data[k] || {});
 
     if ('notifyEvents' in this.data) {
@@ -70,6 +71,7 @@ class TaskConfig extends Task {
   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() {
@@ -139,9 +141,8 @@ class TaskConfig extends Task {
       cs.speechSynthesisVendor = this.synthesizer.vendor !== 'default'
         ? this.synthesizer.vendor
         : cs.speechSynthesisVendor;
-      cs.speechSynthesisLabel = this.synthesizer.label !== 'default'
+      cs.speechSynthesisLabel = this.synthesizer.label === 'default'
-        ? this.synthesizer.label
+        ? cs.speechSynthesisLabel : this.synthesizer.label;
-        : cs.speechSynthesisLabel;
       cs.speechSynthesisLanguage = this.synthesizer.language !== 'default'
         ?  this.synthesizer.language
         : cs.speechSynthesisLanguage;
@@ -153,15 +154,16 @@ class TaskConfig extends Task {
       cs.fallbackSpeechSynthesisVendor = this.synthesizer.fallbackVendor !== 'default'
         ? this.synthesizer.fallbackVendor
         : cs.fallbackSpeechSynthesisVendor;
-      cs.fallbackSpeechSynthesisLabel = this.synthesizer.fallbackLabel !== 'default'
+      cs.fallbackSpeechSynthesisLabel = this.synthesizer.fallbackLabel === 'default'
-        ? this.synthesizer.fallbackLabel
+        ? cs.fallbackSpeechSynthesisLabel : this.synthesizer.fallbackLabel;
-        : cs.fallbackSpeechSynthesisLabel;
       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) {
@@ -169,9 +171,8 @@ class TaskConfig extends Task {
       cs.speechRecognizerVendor = this.recognizer.vendor !== 'default'
         ? this.recognizer.vendor
         : cs.speechRecognizerVendor;
-      cs.speechRecognizerLabel = this.recognizer.label !== 'default'
+      cs.speechRecognizerLabel = this.recognizer.label === 'default'
-        ? this.recognizer.label
+        ? cs.speechRecognizerLabel : this.recognizer.label;
-        : cs.speechRecognizerLabel;
       cs.speechRecognizerLanguage = this.recognizer.language !== 'default'
         ? this.recognizer.language
         : cs.speechRecognizerLanguage;
@@ -180,9 +181,9 @@ class TaskConfig extends Task {
       cs.fallbackSpeechRecognizerVendor = this.recognizer.fallbackVendor !== 'default'
         ? this.recognizer.fallbackVendor
         : cs.fallbackSpeechRecognizerVendor;
-      cs.fallbackSpeechRecognizerLabel = this.recognizer.fallbackLabel !== 'default'
+      cs.fallbackSpeechRecognizerLabel = this.recognizer.fallbackLabel === 'default' ?
-        ? this.recognizer.fallbackLabel
+        cs.fallbackSpeechRecognizerLabel :
-        : cs.fallbackSpeechRecognizerLabel;
+        this.recognizer.fallbackLabel;
       cs.fallbackSpeechRecognizerLanguage = this.recognizer.fallbackLanguage !== 'default'
         ? this.recognizer.fallbackLanguage
         : cs.fallbackSpeechRecognizerLanguage;
@@ -206,6 +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
@@ -246,12 +249,14 @@ class TaskConfig extends Task {
     }
     if (this.hasTranscribe) {
       if (this.transcribe.enable) {
-        this.transcribeOpts.recognizer = this.hasRecognizer ?
+        if (!this.transcribeOpts.recognizer) {
-          this.recognizer :
+          this.transcribeOpts.recognizer = this.hasRecognizer ?
-          {
+            this.recognizer :
-            vendor: cs.speechRecognizerVendor,
+            {
-            language: cs.speechRecognizerLanguage
+              vendor: cs.speechRecognizerVendor,
-          };
+              language: cs.speechRecognizerLanguage
+            };
+        }
         this.logger.debug(this.transcribeOpts, 'Config: enabling transcribe');
         cs.startBackgroundTask('transcribe', this.transcribeOpts);
       } else {
@@ -259,13 +264,8 @@ class TaskConfig extends Task {
         cs.stopBackgroundTask('transcribe');
       }
     }
-
+    if (Object.keys(this.actionHookDelayAction).length !== 0) {
-    if (this.actionHookDelayAction) {
+      cs.actionHookDelayProperties = this.actionHookDelayAction;
-      cs.actionHookDelayEnabled = this.actionHookDelayAction.enabled || false;
-      cs.actionHookNoResponseTimeout = this.actionHookDelayAction.noResponseTimeout || 0;
-      cs.actionHookNoResponseGiveUpTimeout = this.actionHookDelayAction.noResponseGiveUpTimeout || 0;
-      cs.actionHookDelayRetries = this.actionHookDelayAction.retries || 1;
-      cs.actionHookDelayActions = this.actionHookDelayAction.actions || [];
     }
     if (this.data.sipRequestWithinDialogHook) {
       cs.sipRequestWithinDialogHook = this.data.sipRequestWithinDialogHook;
@@ -288,6 +288,16 @@ class TaskConfig extends Task {
         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/dial.js

@@ -636,6 +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', () => {

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,
@@ -27,7 +29,7 @@ class TaskGather extends SttTask {
     [
       'finishOnKey', 'input', 'numDigits', 'minDigits', 'maxDigits',
       'interDigitTimeout', 'partialResultHook', 'bargein', 'dtmfBargein',
-      'speechTimeout', 'timeout', 'say', 'play', 'actionHookDelayAction', 'fillerNoise'
+      'speechTimeout', 'timeout', 'say', 'play', 'actionHookDelayAction', 'fillerNoise', 'vad'
     ].forEach((k) => this[k] = this.data[k]);
 
     // gather default input is digits
@@ -41,7 +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' ?
@@ -114,6 +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;
   }
@@ -128,6 +132,11 @@ class TaskGather extends SttTask {
       ...(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 || [])
@@ -155,27 +164,22 @@ class TaskGather extends SttTask {
       this.interim = true;
       this.logger.debug('Gather:exec - early hints match enabled');
     }
-    // actionHook delay
-    this._hookDelayEn = cs.actionHookDelayEnabled || !!this.actionHookDelayAction;
 
-    this._hookDelayActions = this.actionHookDelayAction?.actions || cs.actionHookDelayActions || [];
+    // 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;
+    }
 
-    // Only enable NoResponseTimeout if there is _hookDelayActions
+    this._startVad();
-    this._hookNoResponseTimeout = (this._hookDelayActions?.length ?
-      (this.actionHookDelayAction?.noResponseTimeout || cs.actionHookNoResponseTimeout || 0)
-      : 0) * 1000;
 
-    this._hookNoResponseGiveUpTimeout = (this.actionHookDelayAction?.noResponseGiveUpTimeout ||
+    const startDtmfListener = () => {
-      cs.actionHookNoResponseGiveUpTimeout || 0) * 1000;
+      if (this.input.includes('digits') || this.dtmfBargein || this.asrDtmfTerminationDigit) {
-
+        ep.on('dtmf', this._onDtmf.bind(this, cs, ep));
-    this._hookDelayRetries = this.actionHookDelayAction?.retries || cs.actionHookDelayRetries || 1;
+      }
-    this._hookDelayRetryCount = 0;
-    this.hookDelayActionOpts = {
-      enabled: this._hookDelayEn,
-      actions: this._hookDelayActions,
-      noResponseTimeoutMs: this._hookNoResponseTimeout,
-      noResponseGiveUpTimeoutMs: this._hookNoResponseGiveUpTimeout,
-      retries: this._hookDelayRetries
     };
 
     const startListening = async(cs, ep) => {
@@ -191,12 +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._startFallback(cs, ep, {error: e});
-            await this._fallback();
-            startListening(cs, ep);
-          } else {
-            this.logger.error({error: e}, 'error in initSpeech');
-          }
         }
       }
     };
@@ -204,13 +203,12 @@ class TaskGather extends SttTask {
     try {
       if (this.sayTask) {
         const {span, ctx} = this.startChildSpan(`nested:${this.sayTask.summary}`);
-        this.sayTask.span = span;
+        const process = () => {
-        this.sayTask.ctx = ctx;
-        this.sayTask.exec(cs, {ep});  // kicked off, _not_ waiting for it to complete
-        this.sayTask.on('playDone', (err) => {
-          span.end();
-          if (err) this.logger.error({err}, 'Gather:exec Error playing tts');
           this.logger.debug('Gather: nested say task completed');
+          if (!this.listenDuringPrompt) {
+            startDtmfListener();
+          }
+          this._stopVad();
           if (!this.killed) {
             startListening(cs, ep);
             if (this.input.includes('speech') && this.vendor === 'nuance' && this.listenDuringPrompt) {
@@ -220,17 +218,27 @@ class TaskGather extends SttTask {
               });
             }
           }
+        };
+        this.sayTask.span = span;
+        this.sayTask.ctx = ctx;
+        this.sayTask.exec(cs, {ep})  // kicked off, _not_ waiting for it to complete
+          .catch((err) => {
+            process();
+          });
+        this.sayTask.on('playDone', (err) => {
+          span.end();
+          if (err) this.logger.error({err}, 'Gather:exec Error playing tts');
+          process();
         });
       }
       else if (this.playTask) {
         const {span, ctx} = this.startChildSpan(`nested:${this.playTask.summary}`);
-        this.playTask.span = span;
+        const process = () => {
-        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');
           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) {
@@ -240,6 +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 {
@@ -252,16 +271,22 @@ class TaskGather extends SttTask {
 
       if (this.input.includes('speech') && this.listenDuringPrompt) {
         await this._setSpeechHandlers(cs, ep);
-        this._startTranscribing(ep);
+        if (!this.resolved && !this.killed) {
-        updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid)
+          this._startTranscribing(ep);
-          .catch(() => {/*already logged error */});
+          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) {
+      if (this.listenDuringPrompt) {
-        ep.on('dtmf', this._onDtmf.bind(this, cs, ep));
+        startDtmfListener();
       }
 
       await this.awaitTaskDone();
+      this._killAudio(cs);
     } catch (err) {
       this.logger.error(err, 'TaskGather:exec error');
     }
@@ -271,13 +296,13 @@ class TaskGather extends SttTask {
   kill(cs) {
     super.kill(cs);
     this._killAudio(cs);
-    this._killActionHookDelayAction();
     this._clearFillerNoiseTimer();
     this.ep.removeAllListeners('dtmf');
     clearTimeout(this.interDigitTimer);
     this._clearAsrTimer();
     this.playTask?.span.end();
     this.sayTask?.span.end();
+    this._stopVad();
     this._resolve('killed');
   }
 
@@ -297,6 +322,9 @@ class TaskGather extends SttTask {
     clearTimeout(this.interDigitTimer);
     let resolved = false;
     if (this.dtmfBargein) {
+      if (!this.playComplete) {
+        this.notifyStatus({event: 'dtmf-bargein-detected', ...evt});
+      }
       this._killAudio(cs);
       this.emit('dtmf', evt);
     }
@@ -355,23 +383,19 @@ class TaskGather extends SttTask {
           ep, GoogleTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
         this.addCustomEventListener(
           ep, GoogleTranscriptionEvents.EndOfUtterance, this._onEndOfUtterance.bind(this, cs, ep));
-        this.addCustomEventListener(
-          ep, GoogleTranscriptionEvents.VadDetected, this._onVadDetected.bind(this, cs, ep));
         break;
 
       case 'aws':
       case 'polly':
         this.bugname = `${this.bugname_prefix}aws_transcribe`;
         this.addCustomEventListener(ep, AwsTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        this.addCustomEventListener(ep, AwsTranscriptionEvents.VadDetected, this._onVadDetected.bind(this, cs, ep));
         break;
       case 'microsoft':
         this.bugname = `${this.bugname_prefix}azure_transcribe`;
         this.addCustomEventListener(
           ep, AzureTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
-        this.addCustomEventListener(ep, AzureTranscriptionEvents.NoSpeechDetected,
+        //this.addCustomEventListener(ep, AzureTranscriptionEvents.NoSpeechDetected,
-          this._onNoSpeechDetected.bind(this, cs, ep));
+        //this._onNoSpeechDetected.bind(this, cs, ep));
-        this.addCustomEventListener(ep, AzureTranscriptionEvents.VadDetected, this._onVadDetected.bind(this, cs, ep));
         break;
       case 'nuance':
         this.bugname = `${this.bugname_prefix}nuance_transcribe`;
@@ -381,8 +405,6 @@ class TaskGather extends SttTask {
           this._onStartOfSpeech.bind(this, cs, ep));
         this.addCustomEventListener(ep, NuanceTranscriptionEvents.TranscriptionComplete,
           this._onTranscriptionComplete.bind(this, cs, ep));
-        this.addCustomEventListener(ep, NuanceTranscriptionEvents.VadDetected,
-          this._onVadDetected.bind(this, cs, ep));
 
         /* stall timers until prompt finishes playing */
         if ((this.sayTask || this.playTask) && this.listenDuringPrompt) {
@@ -405,6 +427,12 @@ class TaskGather extends SttTask {
           ep, SonioxTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
         break;
 
+      case 'verbio':
+        this.bugname = `${this.bugname_prefix}verbio_transcribe`;
+        this.addCustomEventListener(
+          ep, VerbioTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+        break;
+
       case 'cobalt':
         this.bugname = `${this.bugname_prefix}cobalt_transcribe`;
         this.addCustomEventListener(
@@ -452,8 +480,6 @@ class TaskGather extends SttTask {
           this._onStartOfSpeech.bind(this, cs, ep));
         this.addCustomEventListener(ep, NvidiaTranscriptionEvents.TranscriptionComplete,
           this._onTranscriptionComplete.bind(this, cs, ep));
-        this.addCustomEventListener(ep, 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) {
@@ -520,7 +546,8 @@ class TaskGather extends SttTask {
         account_sid: this.cs.accountSid,
         alert_type: AlertType.STT_FAILURE,
         vendor: this.vendor,
-        detail: err.message
+        detail: err.message,
+        target_sid: this.cs.callSid
       });
     }).catch((err) => this.logger.info({err}, 'Error generating alert for tts failure'));
   }
@@ -559,7 +586,10 @@ class TaskGather extends SttTask {
   }
 
   _clearAsrTimer() {
-    if (this._asrTimer) clearTimeout(this._asrTimer);
+    if (this._asrTimer) {
+      this.logger.debug('_clearAsrTimer: asrTimer cleared');
+      clearTimeout(this._asrTimer);
+    }
     this._asrTimer = null;
   }
 
@@ -568,99 +598,6 @@ class TaskGather extends SttTask {
     this.cs.hangup();
   }
 
-  _actionHookDelaySayAction(verb) {
-    delete verb.verb;
-    this.logger.debug(`_actionHookDelaySayAction ${verb}`);
-    this._actionHookDelaySayTask = makeTask(this.logger, {say: verb}, this);
-    const {span, ctx} = this.startChildSpan(`actionHookDelayAction:${this._actionHookDelaySayTask.summary}`);
-    this._actionHookDelaySayTask.span = span;
-    this._actionHookDelaySayTask.ctx = ctx;
-    this._actionHookDelaySayTask.exec(this.cs, {ep: this.ep});
-    this._actionHookDelaySayTask.on('playDone', (err) => {
-      this._actionHookDelaySayTask = null;
-      span.end();
-      if (err) this.logger.error({err}, 'Gather:actionHookDelay Error playing tts');
-    });
-  }
-
-  _killActionHookDelayAction() {
-    this.logger.debug('_killActionHookDelayAction');
-    if (this._actionHookDelaySayTask && !this._actionHookDelaySayTask.killed) {
-      this._actionHookDelaySayTask.removeAllListeners('playDone');
-      this._actionHookDelaySayTask.kill(this.cs);
-      this._actionHookDelaySayTask.span.end();
-      this._actionHookDelaySayTask = null;
-    }
-
-    if (this._actionHookDelayPlayTask && !this._actionHookDelayPlayTask.killed) {
-      this._actionHookDelayPlayTask.removeAllListeners('playDone');
-      this._actionHookDelayPlayTask.kill(this.cs);
-      this._actionHookDelayPlayTask.span.end();
-      this._actionHookDelayPlayTask = null;
-    }
-  }
-
-  _actionHookDelayPlayAction(verb) {
-    delete verb.verb;
-    this.logger.debug(`_actionHookDelayPlayAction ${verb}`);
-    this._actionHookDelayPlayTask = makeTask(this.logger, {play: verb}, this);
-    const {span, ctx} = this.startChildSpan(`actionHookDelayAction:${this._actionHookDelayPlayTask.summary}`);
-    this._actionHookDelayPlayTask.span = span;
-    this._actionHookDelayPlayTask.ctx = ctx;
-    this._actionHookDelayPlayTask.exec(this.cs, {ep: this.ep});
-    this._actionHookDelayPlayTask.on('playDone', (err) => {
-      this._actionHookDelayPlayTask = null;
-      span.end();
-      if (err) this.logger.error({err}, 'Gather:actionHookDelay Error playing tts');
-    });
-
-  }
-
-  _startActionHookNoResponseTimer() {
-    assert(this._hookNoResponseTimeout > 0);
-    this._clearActionHookNoResponseTimer();
-    this.logger.debug('startActionHookNoResponseTimer');
-    this._actionHookNoResponseTimer = setTimeout(() => {
-      if (this._hookDelayRetryCount >= this._hookDelayRetries) {
-        this._hangupCall();
-        return;
-      }
-      const verb = this._hookDelayActions[this._hookDelayRetryCount % this._hookDelayActions.length];
-      if (verb.verb === 'say') {
-        this._actionHookDelaySayAction(verb);
-      } else if (verb.verb === 'play') {
-        this._actionHookDelayPlayAction(verb);
-      }
-      this._hookDelayRetryCount++;
-      this._startActionHookNoResponseTimer();
-
-    }, this._hookNoResponseTimeout);
-
-  }
-
-  _clearActionHookNoResponseTimer() {
-    if (this._actionHookNoResponseTimer) {
-      clearTimeout(this._actionHookNoResponseTimer);
-    }
-    this._actionHookNoResponseTimer = null;
-  }
-
-  _startActionHookNoResponseGiveUpTimer() {
-    assert(this._hookNoResponseGiveUpTimeout > 0);
-    this._clearActionHookNoResponseGiveUpTimer();
-    this.logger.debug('startActionHookNoResponseGiveUpTimer');
-    this._actionHookNoResponseGiveUpTimer = setTimeout(() => {
-      this._hangupCall();
-    }, this._hookNoResponseGiveUpTimeout);
-  }
-
-  _clearActionHookNoResponseGiveUpTimer() {
-    if (this._actionHookNoResponseGiveUpTimer) {
-      clearTimeout(this._actionHookNoResponseGiveUpTimer);
-    }
-    this._actionHookNoResponseGiveUpTimer = null;
-  }
-
   _startFastRecognitionTimer(evt) {
     assert(this.fastRecognitionTimeout > 0);
     this._clearFastRecognitionTimer();
@@ -692,11 +629,44 @@ 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.ep?.play(this.fillerNoise.url);
+      this._startFillerNoise();
     }, this.fillerNoise.startDelaySecs * 1000);
   }
 
@@ -717,6 +687,7 @@ class TaskGather extends SttTask {
       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'));
       }
@@ -732,6 +703,7 @@ class TaskGather extends SttTask {
       this.playTask.kill(cs);
       this.playTask = null;
     }
+    this.playComplete = true;
   }
 
   _onTranscription(cs, ep, evt, fsEvent) {
@@ -740,6 +712,7 @@ class TaskGather extends SttTask {
     const finished = fsEvent.getHeader('transcription-session-finished');
     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') {
@@ -768,6 +741,16 @@ class TaskGather extends SttTask {
       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) {
@@ -834,33 +817,36 @@ 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);
+          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 */
+        if (this.vendor === 'soniox') {
-            this._sonioxTranscripts.push(evt.vendor.finalWords);
+          /* compile transcripts into one */
-            evt = this.compileSonioxTranscripts(this._sonioxTranscripts, 1, this.language);
+          this._sonioxTranscripts.push(evt.vendor.finalWords);
-            this._sonioxTranscripts = [];
+          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 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 {
@@ -881,6 +867,7 @@ class TaskGather extends SttTask {
           if (!this.playComplete) {
             this.logger.debug({transcript: evt.alternatives[0].transcript}, 'killing audio due to speech');
             this.emit('vad');
+            this.notifyStatus({event: 'speech-bargein-detected', ...evt});
           }
           this._killAudio(cs);
         }
@@ -895,12 +882,18 @@ class TaskGather extends SttTask {
           this.cs.callInfo, httpHeaders));
       }
       if (this.vendor === 'soniox') {
-        this._clearTimer();
         if (evt.vendor.finalWords.length) {
           this.logger.debug({evt}, 'TaskGather:_onTranscription - buffering soniox transcript');
           this._sonioxTranscripts.push(evt.vendor.finalWords);
         }
       }
+      // If transcription received, reset timeout timer.
+      if (this._timeoutTimer) {
+        this._startTimer();
+      }
+      /* restart asr timer if we get a partial transcript (only if the asr timer is already running) */
+      /* note: https://github.com/jambonz/jambonz-feature-server/issues/866 */
+      if (this.isContinuousAsr && this._asrTimer) this._startAsrTimer();
     }
   }
   _onEndOfUtterance(cs, ep) {
@@ -932,9 +925,9 @@ class TaskGather extends SttTask {
   _onTranscriptionComplete(cs, ep) {
     this.logger.debug('TaskGather:_onTranscriptionComplete');
   }
-  async _onJambonzError(cs, ep, evt) {
+
-    this.logger.info({evt}, 'TaskGather:_onJambonzError');
+  async _startFallback(cs, ep, evt) {
-    if (this.isHandledByPrimaryProvider && this.fallbackVendor) {
+    if (this.canFallback) {
       ep.stopTranscription({
         vendor: this.vendor,
         bugname: this.bugname
@@ -942,17 +935,35 @@ class TaskGather extends SttTask {
         .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.logger.debug('gather:_startFallback');
-        await this._initSpeech(cs, ep);
+        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');
@@ -964,18 +975,25 @@ class TaskGather extends SttTask {
       alert_type: AlertType.STT_FAILURE,
       message: `Custom speech vendor ${this.vendor} error: ${evt.error}`,
       vendor: this.vendor,
+      target_sid: cs.callSid
     }).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) {
@@ -984,6 +1002,10 @@ 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) {
@@ -1002,7 +1024,20 @@ 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;
     // If bargin is false and ws application return ack to verb:hook
@@ -1013,19 +1048,14 @@ class TaskGather extends SttTask {
     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,
-        bugname: this.bugname
-      })
-        .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');
@@ -1033,59 +1063,80 @@ class TaskGather extends SttTask {
       return;
     }
 
-    // Enabled action Hook delay timer to applied actions
+    // action hook delay
-    if (this._hookNoResponseTimeout > 0) {
+    if (this.cs.actionHookDelayProcessor) {
-      this._startActionHookNoResponseTimer();
+      this.logger.debug('TaskGather:_resolve - actionHookDelayProcessor exists - starting it');
-    }
+      this.cs.actionHookDelayProcessor.start();
-
-    if (this._hookNoResponseGiveUpTimeout > 0) {
-      this._startActionHookNoResponseGiveUpTimer();
     }
 
+    // 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.ep.play(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 all delay timers if there is any
+    // Gather got response from hook, cancel actionHookDelay processing
-    this._clearActionHookNoResponseTimer();
+    this.logger.debug('TaskGather:_resolve - checking ahd');
-    this._clearActionHookNoResponseGiveUpTimer();
+    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/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));
@@ -38,9 +39,9 @@ class TaskRestDial extends Task {
 
     if (this.data.amd) {
       this.startAmd = cs.startAmd;
-      this.stopAmd = cs.stopAmd;
       this.on('amd', this._onAmdEvent.bind(this, cs));
     }
+    this.stopAmd = cs.stopAmd;
 
     this._setCallTimer();
     await this.awaitTaskDone();
@@ -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

@@ -52,27 +52,37 @@ class TaskSay extends TtsTask {
     return `${this.name}{${this.text[0]}}`;
   }
 
+  _validateURL(urlString) {
+    try {
+      new URL(urlString);
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
   async exec(cs, {ep}) {
-    const {srf, accountSid:account_sid} = cs;
+    const {srf, accountSid:account_sid, callSid:target_sid} = cs;
     const {writeAlerts, AlertType} = srf.locals;
     const {addFileToCache} = srf.locals.dbHelpers;
-    const engine = this.synthesizer.engine || 'standard';
+    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' ?
+    // label can be null/empty in synthesizer config, just use application level label if it's default
-      this.synthesizer.label :
+    let label = this.synthesizer.label === 'default' ?
-      cs.speechSynthesisLabel;
+      cs.speechSynthesisLabel :
+      this.synthesizer.label;
 
     const fallbackVendor = this.synthesizer.fallbackVendor && this.synthesizer.fallbackVendor !== 'default' ?
       this.synthesizer.fallbackVendor :
@@ -83,16 +93,24 @@ class TaskSay extends TtsTask {
     const fallbackVoice =  this.synthesizer.fallbackVoice && this.synthesizer.fallbackVoice !== 'default' ?
       this.synthesizer.fallbackVoice :
       cs.fallbackSpeechSynthesisVoice;
-    const fallbackLabel = this.synthesizer.fallbackLabel && this.synthesizer.fallbackLabel !== 'default' ?
+    // label can be null/empty in synthesizer config, just use application level label if it's default
-      this.synthesizer.fallbackLabel :
+    const fallbackLabel = this.synthesizer.fallbackLabel === 'default' ?
-      cs.fallbackSpeechSynthesisLabel;
+      cs.fallbackSpeechSynthesisLabel :
+      this.synthesizer.fallbackLabel;
 
-    let filepath;
+    if (cs.hasFallbackTts) {
-    try {
+      vendor = fallbackVendor;
-      filepath = await this._synthesizeWithSpecificVendor(cs, ep, {vendor, language, voice, label});
+      language = fallbackLanguage;
-    } catch (error) {
+      voice = fallbackVoice;
-      if (fallbackVendor && this.isHandledByPrimaryProvider) {
+      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,
           {
@@ -102,8 +120,16 @@ class TaskSay extends TtsTask {
             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'});
 
@@ -115,22 +141,25 @@ class TaskSay extends TtsTask {
           await this.playToConfMember(ep, memberId, confName, confUuid, filepath[segment]);
         }
         else {
-          if (filepath[segment].startsWith('say:{')) {
+          const isStreaming = filepath[segment].startsWith('say:{');
+          if (isStreaming) {
             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)}`);
+          else this.logger.debug(`Say:exec sending ${filepath[segment].substring(0, 64)}`);
           ep.once('playback-start', (evt) => {
-            this.logger.debug({evt}, 'got playback-start');
+            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) cs.trackTmpFile(evt.variable_tts_cache_filename);
+              if (evt.variable_tts_cache_filename) {
+                cs.trackTmpFile(evt.variable_tts_cache_filename);
+              }
             }
           });
           ep.once('playback-stop', (evt) => {
-            this.logger.debug({evt}, 'got playback-stop');
+            this.logger.debug({evt}, 'Say got playback-stop');
             if (evt.variable_tts_error) {
               writeAlerts({
                 account_sid,
@@ -139,24 +168,62 @@ class TaskSay extends TtsTask {
                 detail: evt.variable_tts_error
               }).catch((err) => this.logger.info({err}, 'Error generating alert for no tts'));
             }
-            if (evt.variable_tts_cache_filename) {
+            else {
-              const text = parseTextFromSayString(this.text[segment]);
+              this.logger.debug({evt}, 'Say got playback-stop');
-              addFileToCache(evt.variable_tts_cache_filename, {
+              if (evt.variable_tts_error) {
-                account_sid,
+                writeAlerts({
-                vendor,
+                  account_sid,
-                language,
+                  alert_type: AlertType.TTS_FAILURE,
-                voice,
+                  vendor,
-                engine,
+                  detail: evt.variable_tts_error,
-                text
+                  target_sid
-              }).catch((err) => this.logger.info({err}, 'Error adding file to cache'));
+                }).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();
             }
           });
-          await ep.play(filepath[segment]);
+          // 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]}`);
           }
-          this.logger.debug(`Say:exec completed play file ${filepath[segment]}`);
         }
         segment++;
       }
@@ -178,6 +245,11 @@ class TaskSay extends TtsTask {
       }
       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;
+      }
     }
   }
 
@@ -187,6 +259,10 @@ class TaskSay extends TtsTask {
       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;
@@ -198,6 +274,9 @@ class TaskSay extends TtsTask {
 }
 
 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',
@@ -205,11 +284,37 @@ const spanMapping = {
   '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

@@ -33,7 +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);
@@ -81,7 +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;
     }
@@ -94,10 +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;
     }
@@ -115,9 +125,19 @@ class SttTask extends Task {
       try {
         this.sttCredentials = await this._initSpeechCredentials(this.cs, this.vendor, this.label);
       } catch (error) {
-        if (this.fallbackVendor && this.isHandledByPrimaryProvider) {
+        if (this.canFallback) {
-          await this._fallback();
+          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;
         }
       }
@@ -149,7 +169,7 @@ class SttTask extends Task {
   }
 
   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) {
@@ -158,13 +178,9 @@ class SttTask extends Task {
       writeAlerts({
         account_sid: cs.accountSid,
         alert_type: AlertType.STT_NOT_PROVISIONED,
-        vendor
+        vendor,
+        target_sid: cs.callSid
       }).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`);
     }
@@ -182,13 +198,33 @@ 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;
@@ -197,6 +233,8 @@ 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) {
@@ -240,6 +278,20 @@ 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;
@@ -258,8 +310,8 @@ class SttTask extends Task {
       message: 'STT failure reported by vendor',
       detail: evt.error,
       vendor: this.vendor,
+      target_sid: cs.callSid
     }).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) {
@@ -271,8 +323,8 @@ class SttTask extends Task {
       alert_type: AlertType.STT_FAILURE,
       message: `Failed connecting to ${this.vendor} speech recognizer: ${reason}`,
       vendor: this.vendor,
+      target_sid: cs.callSid
     }).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;
   }
@@ -177,15 +181,16 @@ class Task extends Emitter {
           // 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) {
+          //if (this.hookDelayActionOpts) {
-            this.emit('ActionHookDelayActionOptions', 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.callSession.replaceApplication(tasks);
+            return true;
           }
         }
       } catch (err) {
@@ -193,6 +198,7 @@ class Task extends Emitter {
         span.end();
         throw err;
       }
+      return false;
     }
   }
 
@@ -272,6 +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

@@ -104,12 +104,15 @@ class TaskTranscribe extends SttTask {
 
       updateSpeechCredentialLastUsed(this.sttCredentials.speech_credential_sid)
         .catch(() => {/*already logged error */});
-
-      await this.awaitTaskDone();
     } catch (err) {
-      this.logger.info(err, 'TaskTranscribe:exec - error');
+      if (!(await this._startFallback(cs, ep, {error: err}))) {
-      this.parentTask && this.parentTask.emit('error', err);
+        this.logger.info(err, 'TaskTranscribe:exec - error');
+        this.parentTask && this.parentTask.emit('error', err);
+        this.removeCustomEventListeners();
+        return;
+      }
     }
+    await this.awaitTaskDone();
     this.removeCustomEventListeners();
   }
 
@@ -123,7 +126,7 @@ class TaskTranscribe extends SttTask {
       })
         .catch((err) => this.logger.info(err, 'Error TaskTranscribe:kill'));
     }
-    if (this.transcribing2 && this.ep2.connected) {
+    if (this.transcribing2 && this.ep2?.connected) {
       stopTranscription = true;
       this.ep2.stopTranscription({vendor: this.vendor, bugname: this.bugname})
         .catch((err) => this.logger.info(err, 'Error TaskTranscribe:kill'));
@@ -194,8 +197,8 @@ class TaskTranscribe extends SttTask {
         this.bugname = `${this.bugname_prefix}azure_transcribe`;
         this.addCustomEventListener(ep, AzureTranscriptionEvents.Transcription,
           this._onTranscription.bind(this, cs, ep, channel));
-        this.addCustomEventListener(ep, AzureTranscriptionEvents.NoSpeechDetected,
+        //this.addCustomEventListener(ep, AzureTranscriptionEvents.NoSpeechDetected,
-          this._onNoAudio.bind(this, cs, ep, channel));
+        //  this._onNoAudio.bind(this, cs, ep, channel));
         break;
       case 'nuance':
         this.bugname = `${this.bugname_prefix}nuance_transcribe`;
@@ -212,7 +215,7 @@ class TaskTranscribe extends SttTask {
           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':
@@ -336,6 +339,12 @@ class TaskTranscribe extends SttTask {
 
     if (this.vendor === 'deepgram' && evt.type === 'UtteranceEnd') {
       /* we will only get this when we have set utterance_end_ms */
+
+      /* 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');
       }
@@ -420,9 +429,13 @@ class TaskTranscribe extends SttTask {
         /* 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']
+        if (!['soniox', 'aws', 'microsoft', 'deepgram', 'google'].includes(this.vendor) &&
-          .includes(this.vendor)) this._startTranscribing(cs, ep, channel);
+          !this.vendor.startsWith('custom:')) {
+          this.logger.debug('TaskTranscribe:_onTranscription - restarting transcribe');
+          this._startTranscribing(cs, ep, channel);
+        }
       }
     }
     else {
@@ -445,26 +458,31 @@ class TaskTranscribe extends SttTask {
   }
 
   async _resolve(channel, evt) {
-    /* we've got a transcript, so end the otel child span for this channel */
+    if (evt.is_final) {
-    if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
+      /* we've got a final transcript, so end the otel child span for this channel */
-      this.childSpan[channel - 1].span.setAttributes({
+      if (this.childSpan[channel - 1] && this.childSpan[channel - 1].span) {
-        channel,
+        this.childSpan[channel - 1].span.setAttributes({
-        'stt.resolve': 'transcript',
+          channel,
-        'stt.result': JSON.stringify(evt)
+          'stt.resolve': 'transcript',
-      });
+          'stt.result': JSON.stringify(evt)
-      this.childSpan[channel - 1].span.end();
+        });
+        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.logger.debug({payload}, 'sending transcriptionHook');
-          ...this.cs.callInfo,
+        const json = await this.cs.requestor.request('verb:hook', this.transcriptionHook, payload);
-          ...httpHeaders,
+        this.logger.info({json}, 'completed transcriptionHook');
-          speech: evt
-        });
-        this.logger.info({json}, 'sent 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));
@@ -485,7 +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};
@@ -534,10 +552,8 @@ class TaskTranscribe extends SttTask {
     }
   }
 
-  async _onJambonzError(cs, _ep, evt) {
+  async _startFallback(cs, _ep, evt) {
-    this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
+    if (this.canFallback) {
-    if (this.paused) return;
-    if (this.isHandledByPrimaryProvider && this.fallbackVendor) {
       _ep.stopTranscription({
         vendor: this.vendor,
         bugname: this.bugname
@@ -545,38 +561,58 @@ class TaskTranscribe extends SttTask {
         .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') {
+  async _onJambonzError(cs, _ep, evt) {
-        const {code, error} = evt;
+    if (this.vendor === 'google' && evt.error_code === 0) {
-        //TODO: fix below, currently _resolve does not send timeout events
+      this.logger.info({evt}, 'TaskTranscribe:_onJambonzError - ignoring google error code 0');
-        if (code === 404 && error === 'No speech') return this._resolve('timeout');
+      return;
-        if (code === 413 && error === 'Too much speech') return this._resolve('timeout');
+    }
-      }
+    this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
-      this.logger.info({evt}, 'TaskTranscribe:_onJambonzError');
+    if (this.paused) return;
-      writeAlerts({
+    const {writeAlerts, AlertType} = cs.srf.locals;
-        account_sid: cs.accountSid,
+
-        alert_type: AlertType.STT_FAILURE,
+    if (this.vendor === 'nuance') {
-        message: `Custom speech vendor ${this.vendor} error: ${evt.error}`,
+      const {code, error} = evt;
-        vendor: this.vendor,
+      if (code === 404 && error === 'No speech') return this._resolve('timeout');
-      }).catch((err) => this.logger.info({err}, 'Error generating alert for jambonz custom connection failure'));
+      if (code === 413 && error === 'Too much speech') return this._resolve('timeout');
-      this.notifyError({msg: 'ASR error', details:`Custom speech vendor ${this.vendor} error: ${evt.error}`});
+    }
+    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,
+      target_sid: cs.callSid
+    }).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({
@@ -585,7 +621,9 @@ class TaskTranscribe extends SttTask {
       });
       this.childSpan[channel - 1].span.end();
     }
-    this.notifyTaskDone();
+    if (!(await this._startFallback(cs, _ep, evt))) {
+      this.notifyTaskDone();
+    }
   }
 
   _startAsrTimer(channel) {

lib/tasks/tts-task.js

@@ -17,21 +17,31 @@ class TtsTask extends Task {
 
   async exec(cs) {
     super.exec(cs);
+    if (cs.synthesizer) {
+      this.options = {...cs.synthesizer.options, ...this.options};
+      this.data.synthesizer = this.data.synthesizer || {};
+      for (const k in cs.synthesizer) {
+        const newValue = this.data.synthesizer && this.data.synthesizer[k] !== undefined ?
+          this.data.synthesizer[k] :
+          cs.synthesizer[k];
+
+        if (Array.isArray(newValue)) {
+          this.data.synthesizer[k] = [...(this.data.synthesizer[k] || []), ...cs.synthesizer[k]];
+        } else if (typeof newValue === 'object' && newValue !== null) {
+          this.data.synthesizer[k] = { ...(this.data.synthesizer[k] || {}), ...cs.synthesizer[k] };
+        } else {
+          this.data.synthesizer[k] = newValue;
+        }
+      }
+    }
   }
 
-  async _synthesizeWithSpecificVendor(cs, ep, {
+  async _synthesizeWithSpecificVendor(cs, ep, {vendor, language, voice, label, preCache = false}) {
-    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 || 'standard';
+    const engine = this.synthesizer.engine || cs.synthesizer?.engine || 'neural';
     const salt = cs.callSid;
 
     let credentials = cs.getSpeechCredentials(vendor, 'tts', label);
@@ -65,23 +75,23 @@ class TtsTask extends Task {
     }
 
     ep.set({
-      tts_engine: vendor,
+      tts_engine: vendor.startsWith('custom:') ? 'custom' : vendor,
       tts_voice: voice,
-      cache_speech_handles: 1,
+      cache_speech_handles: !cs.currentTtsVendor || cs.currentTtsVendor === vendor ? 1 : 0,
-    }).catch((err) => this.logger.info({err}, `${this.name}: Error setting tts_engine on endpoint`));
+    }).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.logger.info({vendor, language, voice, model}, `${this.name}:exec`);
+    if (!preCache && !this._disableTracing) this.logger.info({vendor, language, voice, model}, 'TaskSay:exec');
     try {
       if (!credentials) {
         writeAlerts({
           account_sid,
           alert_type: AlertType.TTS_NOT_PROVISIONED,
-          vendor
+          vendor,
+          target_sid: cs.callSid
         }).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
@@ -93,7 +103,7 @@ class TtsTask extends Task {
         if (text.startsWith('silence_stream://')) return text;
 
         /* otel: trace time for tts */
-        if (!preCache && !this.parentTask)  {
+        if (!preCache && !this._disableTracing)  {
           const {span} = this.startChildSpan('tts-generation', {
             'tts.vendor': vendor,
             'tts.language': language,
@@ -114,11 +124,10 @@ class TtsTask extends Task {
             credentials,
             options: this.options,
             disableTtsCache : this.disableTtsCache,
-            disableTtsStreaming,
+            renderForCaching: preCache
-            preCache
           });
           if (!filePath.startsWith('say:')) {
-            this.logger.debug(`file ${filePath}, served from cache ${servedFromCache}`);
+            this.logger.debug(`Say: file ${filePath}, served from cache ${servedFromCache}`);
             if (filePath) cs.trackTmpFile(filePath);
             if (this.otelSpan) {
               this.otelSpan.setAttributes({'tts.cached': servedFromCache});
@@ -129,7 +138,7 @@ class TtsTask extends Task {
               lastUpdated = true;
               updateSpeechCredentialLastUsed(credentials.speech_credential_sid).catch(() => {/* logged error */});
             }
-            if (!servedFromCache && rtt && !preCache) {
+            if (!servedFromCache && rtt && !preCache  && !this._disableTracing) {
               this.notifyStatus({
                 event: 'synthesized-audio',
                 vendor,
@@ -140,7 +149,7 @@ class TtsTask extends Task {
             }
           }
           else {
-            this.logger.debug('a streaming tts api will be used');
+            this.logger.debug('Say: a streaming tts api will be used');
             const modifiedPath = filePath.replace('say:{', `say:{session-uuid=${ep.uuid},`);
             return modifiedPath;
           }
@@ -152,9 +161,9 @@ class TtsTask extends Task {
             account_sid: cs.accountSid,
             alert_type: AlertType.TTS_FAILURE,
             vendor,
-            detail: err.message
+            detail: err.message,
+            target_sid: cs.callSid
           }).catch((err) => this.logger.info({err}, 'Error generating alert for tts failure'));
-          this.notifyError({msg: 'TTS error', details: err.message || err});
           throw err;
         }
       };
@@ -165,6 +174,7 @@ class TtsTask extends Task {
       this.logger.info(err, 'TaskSay:exec error');
       throw err;
     }
+
   }
 
   _validateURL(urlString) {

lib/utils/action-hook-delay.js

@@ -0,0 +1,168 @@
+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._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: stopping ${this._taskInProgress.name}`);
+
+      this._sayResolver = () => {
+        this.logger.debug('ActionHookDelayProcessor#stop: play/say is done, continue on..');
+        //this._taskInProgress.kill(this.cs);
+        this._taskInProgress = null;
+      };
+
+      /* we let Say finish, but interrupt Play */
+      if (TaskName.Play === this._taskInProgress.name) {
+        await this._taskInProgress.kill(this.cs);
+      }
+      return new Promise((resolve) => this._sayResolver = resolve);
+    }
+    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}, 'ActionHookDelayProcessor#_onNoResponseTimer 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

@@ -210,7 +210,8 @@ module.exports = (logger) => {
         account_sid: cs.accountSid,
         alert_type: AlertType.STT_FAILURE,
         vendor: vendor,
-        detail: err.message
+        detail: err.message,
+        target_sid: cs.callSid
       });
     }).catch((err) => logger.info({err}, 'Error generating alert for tts failure'));
 
@@ -245,7 +246,10 @@ module.exports = (logger) => {
     const amd = ep.amd = new Amd(logger, cs, opts);
     const {vendor, language} = amd;
     let sttCredentials = amd.sttCredentials;
-    const hints = voicemailHints[language] || [];
+    // hints from configuration might be too long for specific language and vendor that make transcribe freeswitch
+    // modules cannot connect to the vendor. hints is used in next step to validate if the transcription
+    // matchs voice mail hints.
+    const hints = [];
 
     if (vendor === 'nuance' && sttCredentials.client_id) {
       /* get nuance access token */

lib/utils/background-task-manager.js

@@ -26,7 +26,7 @@ class BackgroundTaskManager extends Emitter {
     return this.tasks.size;
   }
 
-  async newTask(type, opts) {
+  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`);
@@ -52,6 +52,7 @@ class BackgroundTaskManager extends Emitter {
     if (task) {
       this.tasks.set(type, task);
     }
+    if (task && sticky) task.sticky = true;
     return task;
   }
 
@@ -116,7 +117,8 @@ class BackgroundTaskManager extends Emitter {
           this._taskCompleted('bargeIn', task);
           if (task.sticky && !this.cs.callGone && !this.cs._stopping) {
             this.logger.info('BackgroundTaskManager:_initBargeIn: restarting background bargeIn');
-            this.newTask('bargeIn', opts);
+            this._bargeInHandled = false;
+            this.newTask('bargeIn', opts, true);
           }
           return;
         })
@@ -185,6 +187,8 @@ class BackgroundTaskManager extends Emitter {
   }
 
   _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);

lib/utils/constants.json

@@ -97,6 +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",
@@ -134,6 +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",

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) {
@@ -76,6 +77,7 @@ const speechMapper = (cred) => {
       const o = JSON.parse(decrypt(credential));
       obj.api_key = o.api_key;
       obj.deepgram_stt_uri = o.deepgram_stt_uri;
+      obj.deepgram_tts_uri = o.deepgram_tts_uri;
       obj.deepgram_stt_use_tls = o.deepgram_stt_use_tls;
     }
     else if ('soniox' === obj.vendor) {
@@ -100,6 +102,11 @@ const speechMapper = (cred) => {
       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;
@@ -107,6 +114,11 @@ 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/install-srf-locals.js

@@ -12,6 +12,7 @@ const {
   JAMBONES_TIME_SERIES_HOST,
   JAMBONES_ESL_LISTEN_ADDRESS,
   PORT,
+  HTTP_IP,
   NODE_ENV,
 } = require('../config');
 const Registrar = require('@jambonz/mw-registrar');
@@ -171,7 +172,7 @@ function installSrfLocals(srf, logger) {
     retrieveFromSortedSet,
     retrieveByPatternSortedSet,
     sortedSetLength,
-    sortedSetPositionByPattern
+    sortedSetPositionByPattern,
   } = require('@jambonz/realtimedb-helpers')({}, logger, tracer);
   const registrar = new Registrar(logger, client);
   const {
@@ -179,6 +180,8 @@ function installSrfLocals(srf, logger) {
     addFileToCache,
     getNuanceAccessToken,
     getIbmAccessToken,
+    getAwsAuthToken,
+    getVerbioAccessToken
   } = require('@jambonz/speech-utils')({}, logger);
   const {
     writeAlerts,
@@ -191,7 +194,8 @@ function installSrfLocals(srf, logger) {
 
   let localIp;
   try {
-    localIp = ip.address();
+    // Either use the configured IP address or call ip.address() to find it
+    localIp = HTTP_IP || ip.address();
   } catch (err) {
     logger.error({err}, 'installSrfLocals - error detecting local ipv4 address');
   }
@@ -216,6 +220,7 @@ function installSrfLocals(srf, logger) {
       listCalls,
       deleteCall,
       synthAudio,
+      getAwsAuthToken,
       addFileToCache,
       createHash,
       retrieveHash,
@@ -237,7 +242,8 @@ function installSrfLocals(srf, logger) {
       retrieveFromSortedSet,
       retrieveByPatternSortedSet,
       sortedSetLength,
-      sortedSetPositionByPattern
+      sortedSetPositionByPattern,
+      getVerbioAccessToken
     },
     parentLogger: logger,
     getSBC,

lib/utils/place-outdial.js

@@ -441,7 +441,7 @@ class SingleDialer extends Emitter {
     });
     app.requestor.request('session:adulting', '/adulting', {
       ...cs.callInfo.toJSON(),
-      parentCallInfo: this.parentCallInfo
+      parentCallInfo: this.parentCallInfo.toJSON()
     }).catch((err) => {
       newLogger.error({err}, 'doAdulting: error sending adulting request');
     });

lib/utils/transcription-utils.js

@@ -45,7 +45,8 @@ const stickyVars = {
     'DEEPGRAM_SPEECH_ENDPOINTING',
     'DEEPGRAM_SPEECH_UTTERANCE_END_MS',
     'DEEPGRAM_SPEECH_VAD_TURNOFF',
-    'DEEPGRAM_SPEECH_TAG'
+    'DEEPGRAM_SPEECH_TAG',
+    'DEEPGRAM_SPEECH_MODEL_VERSION'
   ],
   aws: [
     'AWS_VOCABULARY_NAME',
@@ -141,7 +142,6 @@ const optimalDeepramModels = {
   tr: ['nova-2', 'nova-2'],
   uk: ['nova-2', 'nova-2']
 };
-
 const selectDefaultDeepgramModel = (task, language) => {
   if (language in optimalDeepramModels) {
     const [gather, transcribe] = optimalDeepramModels[language];
@@ -150,6 +150,24 @@ const selectDefaultDeepgramModel = (task, language) => {
   return 'base';
 };
 
+const optimalGoogleModels = {
+  'v1' : {
+    'en-IN':['telephony', 'latest_long']
+  },
+  'v2' : {
+    'en-IN':['telephony', 'long']
+  }
+};
+const selectDefaultGoogleModel = (task, language, version) => {
+  const useV2 = version === 'v2';
+  if (language in optimalGoogleModels[version]) {
+    const [gather, transcribe] = optimalGoogleModels[version][language];
+    return task.name === TaskName.Gather ? gather : transcribe;
+  }
+  return task.name === TaskName.Gather ?
+    (useV2 ? 'telephony_short' : 'command_and_search') :
+    (useV2 ? 'long' : 'latest_long');
+};
 const consolidateTranscripts = (bufferedTranscripts, channel, language, vendor) => {
   if (bufferedTranscripts.length === 1) return bufferedTranscripts[0];
   let totalConfidence = 0;
@@ -316,8 +334,10 @@ const normalizeIbm = (evt, channel, language) => {
 
 const normalizeGoogle = (evt, channel, language) => {
   const copy = JSON.parse(JSON.stringify(evt));
+  const language_code = evt.language_code || language;
+
   return {
-    language_code: language,
+    language_code: language_code,
     channel_tag: channel,
     is_final: evt.is_final,
     alternatives: [evt.alternatives[0]],
@@ -376,6 +396,20 @@ const normalizeNuance = (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;
@@ -463,6 +497,8 @@ 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);
@@ -474,23 +510,13 @@ module.exports = (logger) => {
 
   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 useV2 = rOpts.googleOptions?.serviceVersion === 'v2';
-      const model = task.name === TaskName.Gather ?
+      const version = useV2 ? 'v2' : 'v1';
-        (useV2 ? 'telephony_short' : 'command_and_search') :
+      let {model} = rOpts;
-        (useV2 ? 'long' : 'latest_long');
+      model = model || selectDefaultGoogleModel(task, language, version);
       opts = {
         ...opts,
         ...(sttCredentials && {GOOGLE_APPLICATION_CREDENTIALS: JSON.stringify(sttCredentials.credentials)}),
@@ -552,9 +578,10 @@ 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,
+          ...(sttCredentials.accessKeyId && {AWS_ACCESS_KEY_ID: sttCredentials.accessKeyId}),
-          AWS_SECRET_ACCESS_KEY: sttCredentials.secretAccessKey,
+          ...(sttCredentials.secretAccessKey && {AWS_SECRET_ACCESS_KEY: sttCredentials.secretAccessKey}),
-          AWS_REGION: sttCredentials.region
+          AWS_REGION: sttCredentials.region,
+          ...(sttCredentials.sessionToken && {AWS_SESSION_TOKEN: sttCredentials.sessionToken}),
         }),
       };
     }
@@ -583,6 +610,8 @@ module.exports = (logger) => {
           {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}),
@@ -690,13 +719,17 @@ module.exports = (logger) => {
         ...(deepgramOptions.keywords) &&
           {DEEPGRAM_SPEECH_KEYWORDS: deepgramOptions.keywords.join(',')},
         ...('endpointing' in deepgramOptions) &&
-          {DEEPGRAM_SPEECH_ENDPOINTING: deepgramOptions.endpointing === false ? 'false' : 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) &&
           {DEEPGRAM_SPEECH_VAD_TURNOFF: deepgramOptions.vadTurnoff},
         ...(deepgramOptions.tag) &&
-          {DEEPGRAM_SPEECH_TAG: deepgramOptions.tag}
+          {DEEPGRAM_SPEECH_TAG: deepgramOptions.tag},
+        ...(deepgramOptions.version) &&
+          {DEEPGRAM_SPEECH_MODEL_VERSION: deepgramOptions.version}
       };
     }
     else if ('soniox' === vendor) {
@@ -803,9 +836,28 @@ module.exports = (logger) => {
         ...(rOpts.hints?.length > 0 &&
           {ASSEMBLYAI_WORD_BOOST: JSON.stringify(rOpts.hints)})
       };
-    }
+    } else if ('verbio' === vendor) {
-    else if (vendor.startsWith('custom:')) {
+      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 {sampleRate} = rOpts.customOptions || {};
       const {auth_token, custom_stt_url} = sttCredentials;
       options = {
         ...options,
@@ -813,14 +865,15 @@ module.exports = (logger) => {
         {hints: rOpts.hints}),
         ...(rOpts.hints?.length > 0 && typeof rOpts.hints[0] === 'object' &&
         {hints: JSON.stringify(rOpts.hints)}),
-        ...(typeof rOpts.hintsBoost === 'number' && {hintsBoost: rOpts.hintsBoost})
+        ...(typeof rOpts.hintsBoost === 'number' && {hintsBoost: rOpts.hintsBoost}),
+        ...(task.cs?.callSid && {callSid: task.cs.callSid})
       };
-
       opts = {
         ...opts,
         ...(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)}),
+        ...(sampleRate && {JAMBONZ_STT_SAMPLING: sampleRate})
       };
     }
 

lib/utils/ws-requestor.js

@@ -56,6 +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')) {
@@ -71,20 +77,23 @@ class WsRequestor extends BaseRequestor {
     }
 
     /* connect if necessary */
+    const queueMsg = () => {
+      this.logger.debug(
+        `WsRequestor:request(${this.id}) - queueing ${type} message since we are connecting`);
+      if (wantsAck) {
+        const p = new Promise((resolve, reject) => {
+          this.queuedMsg.push({type, hook, params, httpHeaders, promise: {resolve, reject}});
+        });
+        return p;
+      }
+      else {
+        this.queuedMsg.push({type, hook, params, httpHeaders});
+      }
+      return;
+    };
     if (!this.ws) {
       if (this.connectInProgress) {
-        this.logger.debug(
+        return queueMsg();
-          `WsRequestor:request(${this.id}) - queueing ${type} message since we are connecting`);
-        if (wantsAck) {
-          const p = new Promise((resolve, reject) => {
-            this.queuedMsg.push({type, hook, params, httpHeaders, promise: {resolve, reject}});
-          });
-          return p;
-        }
-        else {
-          this.queuedMsg.push({type, hook, params, httpHeaders});
-        }
-        return;
       }
       this.connectInProgress = true;
       this.logger.debug(`WsRequestor:request(${this.id}) - connecting since we do not have a connection for ${type}`);
@@ -102,6 +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 */
@@ -139,6 +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 */
@@ -179,16 +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();
       });
     });

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jambonz-feature-server",
-  "version": "0.9.0",
+  "version": "0.9.2",
   "main": "app.js",
   "engines": {
     "node": ">= 18.x"
@@ -27,14 +27,14 @@
   "dependencies": {
     "@aws-sdk/client-auto-scaling": "^3.549.0",
     "@aws-sdk/client-sns": "^3.549.0",
-    "@jambonz/db-helpers": "^0.9.3",
+    "@jambonz/db-helpers": "^0.9.6",
     "@jambonz/http-health-check": "^0.0.1",
     "@jambonz/mw-registrar": "^0.2.7",
     "@jambonz/realtimedb-helpers": "^0.8.8",
-    "@jambonz/speech-utils": "^0.0.50",
+    "@jambonz/speech-utils": "^0.1.15",
-    "@jambonz/stats-collector": "^0.1.9",
+    "@jambonz/stats-collector": "^0.1.10",
-    "@jambonz/time-series": "^0.2.8",
+    "@jambonz/time-series": "^0.2.9",
-    "@jambonz/verb-specifications": "^0.0.69",
+    "@jambonz/verb-specifications": "^0.0.76",
     "@opentelemetry/api": "^1.8.0",
     "@opentelemetry/exporter-jaeger": "^1.23.0",
     "@opentelemetry/exporter-trace-otlp-http": "^0.50.0",
@@ -47,8 +47,8 @@
     "bent": "^7.3.12",
     "debug": "^4.3.4",
     "deepcopy": "^2.1.0",
-    "drachtio-fsmrf": "^3.0.40",
+    "drachtio-fsmrf": "^3.0.45",
-    "drachtio-srf": "^4.5.31",
+    "drachtio-srf": "^4.5.35",
     "express": "^4.19.2",
     "express-validator": "^7.0.1",
     "ip": "^2.0.1",
@@ -58,13 +58,13 @@
     "polly-ssml-split": "^0.1.0",
     "proxyquire": "^2.1.3",
     "sdp-transform": "^2.14.2",
-    "short-uuid": "^4.2.2",
+    "short-uuid": "^5.1.0",
     "sinon": "^17.0.1",
     "to-snake-case": "^1.0.0",
-    "undici": "^6.11.1",
+    "undici": "^6.19.4",
     "uuid-random": "^1.3.2",
     "verify-aws-sns-signature": "^0.1.0",
-    "ws": "^8.16.0",
+    "ws": "^8.18.0",
     "xml2js": "^0.6.2"
   },
   "devDependencies": {

test/docker-compose-testbed.yaml

@@ -57,7 +57,7 @@ services:
         condition: service_healthy
 
   freeswitch:
-    image: drachtio/drachtio-freeswitch-mrf:0.7.3
+    image: drachtio/drachtio-freeswitch-mrf:latest
     restart: always
     command: freeswitch --rtp-range-start 20000 --rtp-range-end 20100
     environment: