diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-ci.yml
similarity index 81%
rename from .github/workflows/npm-publish.yml
rename to .github/workflows/npm-ci.yml
index c8d315c..09beae0 100644
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-ci.yml
@@ -11,8 +11,8 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
-      - run: npm install
+          node-version: 14.x
+      - run: npm ci
       - run: npm run jslint
       - run: npm test
 
diff --git a/.gitignore b/.gitignore
index 05c16a1..bbb805f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,6 @@
 logs
 *.log
 .vscode/
-
 # Runtime data
 pids
 *.pid
diff --git a/app.js b/app.js
index cadf23d..c3e5728 100644
--- a/app.js
+++ b/app.js
@@ -26,6 +26,7 @@ const {
 });
 const StatsCollector = require('@jambonz/stats-collector');
 const stats = new StatsCollector(logger);
+const {equalsIgnoreOrder} = require('./lib/utils');
 const {LifeCycleEvents} = require('./lib/constants');
 const setNameRtp = `${(process.env.JAMBONES_CLUSTER_ID || 'default')}:active-rtp`;
 const rtpServers = [];
@@ -56,7 +57,7 @@ const {createSet, retrieveSet, addToSet, removeFromSet, incrKey, decrKey} = requ
 const {getRtpEngine, setRtpEngines} = require('@jambonz/rtpengine-utils')([], logger, {
   emitter: stats,
   dtmfListenPort: process.env.DTMF_LISTEN_PORT || 22224,
-  protocol: process.env.RTPENGINE_NG_PROTOCOL || (process.env.K8S ? 'ws' : 'udp')
+  protocol: 'udp'
 });
 srf.locals = {...srf.locals,
   stats,
@@ -173,39 +174,55 @@ srf.use((req, res, next, err) => {
 if (process.env.K8S) {
   const PORT = process.env.HTTP_PORT || 3000;
   const getCount = () => activeCallIds.size;
-  const healthCheck = 
+  const healthCheck = require('@jambonz/http-health-check');
   healthCheck({port: PORT, logger, path: '/', fn: getCount});
 }
+if ('test' !== process.env.NODE_ENV) {
+  /* update call stats periodically */
+  setInterval(() => {
+    stats.gauge('sbc.sip.calls.count', activeCallIds.size, ['direction:inbound']);
+  }, 20000);
+}
 
-/* update call stats periodically */
-setInterval(() => {
-  stats.gauge('sbc.sip.calls.count', activeCallIds.size, ['direction:inbound']);
-}, 20000);
-
-const arrayCompare = (a, b) => {
-  if (a.length !== b.length) return false;
-  const uniqueValues = new Set([...a, ...b]);
-  for (const v of uniqueValues) {
-    const aCount = a.filter((e) => e === v).length;
-    const bCount = b.filter((e) => e === v).length;
-    if (aCount !== bCount) return false;
-  }
-  return true;
+const lookupRtpServiceEndpoints = (lookup, serviceName) => {
+  logger.debug(`dns lookup for ${serviceName}..`);
+  lookup(serviceName, {family: 4, all: true}, (err, addresses) => {
+    if (err) {
+      logger.error({err}, `Error looking up ${serviceName}`);
+      return;
+    }
+    logger.debug({addresses, rtpServers}, `dns lookup for ${serviceName} returned`);
+    const addrs = addresses.map((a) => a.address);
+    if (!equalsIgnoreOrder(addrs, rtpServers)) {
+      rtpServers.length = 0;
+      Array.prototype.push.apply(rtpServers, addrs);
+      logger.info({rtpServers}, 'rtpserver endpoints have been updated');
+      setRtpEngines(rtpServers.map((a) => `${a}:${process.env.RTPENGINE_PORT || 22222}`));
+    }
+  });
 };
 
-const serviceName = process.env.JAMBONES_RTPENGINES || process.env.K8S_RTPENGINE_SERVICE_NAME;
-if (serviceName) {
-  logger.info(`rtpengine(s) will be found at: ${serviceName}`);
-  setRtpEngines([serviceName]);
+if (process.env.K8S_RTPENGINE_SERVICE_NAME) {
+  /* poll dns for endpoints every so often */
+  const arr = /^(.*):(\d+)$/.exec(process.env.K8S_RTPENGINE_SERVICE_NAME);
+  const svc = arr[1];
+  logger.info(`rtpengine(s) will be found at dns name: ${svc}`);
+  const {lookup} = require('dns');
+  lookupRtpServiceEndpoints(lookup, svc);
+  setInterval(lookupRtpServiceEndpoints.bind(null, lookup, svc), process.env.RTPENGINE_DNS_POLL_INTERVAL || 10000);
+}
+else if (process.env.JAMBONES_RTPENGINES) {
+  /* static list of rtpengines */
+  setRtpEngines([process.env.JAMBONES_RTPENGINES]);
 }
 else {
-  /* update rtpengines periodically */
+  /* poll redis periodically for rtpengines that have registered via OPTIONS ping */
   const getActiveRtpServers = async() => {
     try {
       const set = await retrieveSet(setNameRtp);
       const newArray = Array.from(set);
       logger.debug({newArray, rtpServers}, 'getActiveRtpServers');
-      if (!arrayCompare(newArray, rtpServers)) {
+      if (!equalsIgnoreOrder(newArray, rtpServers)) {
         logger.info({newArray}, 'resetting active rtpengines');
         setRtpEngines(newArray.map((a) => `${a}:${process.env.RTPENGINE_PORT || 22222}`));
         rtpServers.length = 0;
diff --git a/lib/call-session.js b/lib/call-session.js
index e4051f3..877d248 100644
--- a/lib/call-session.js
+++ b/lib/call-session.js
@@ -197,7 +197,7 @@ class CallSession extends Emitter {
       this._setHandlers({uas, uac});
       return;
     } catch (err) {
-      this.rtpEngineResource.destroy();
+      this.rtpEngineResource.destroy().catch((err) => this.logger.info({err}, 'Error destroying rtpe after failure'));
       this.activeCallIds.delete(this.req.get('Call-ID'));
       this.stats.gauge('sbc.sip.calls.count', this.activeCallIds.size);
       if (err instanceof SipError) {
diff --git a/lib/utils.js b/lib/utils.js
index d5194da..8e0c12b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -45,11 +45,23 @@ const normalizeDID = (tel) => {
   return arr ? arr[1] : tel;
 };
 
+const equalsIgnoreOrder = (a, b) => {
+  if (a.length !== b.length) return false;
+  const uniqueValues = new Set([...a, ...b]);
+  for (const v of uniqueValues) {
+    const aCount = a.filter((e) => e === v).length;
+    const bCount = b.filter((e) => e === v).length;
+    if (aCount !== bCount) return false;
+  }
+  return true;
+};
+
 module.exports = {
   isWSS,
   SdpWantsSrtp,
   getAppserver,
   makeRtpEngineOpts,
   makeCallCountKey,
-  normalizeDID
+  normalizeDID,
+  equalsIgnoreOrder
 };
diff --git a/package-lock.json b/package-lock.json
index 1a30f35..e5d548c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,6 +5,7 @@
   "requires": true,
   "packages": {
     "": {
+      "name": "sbc-inbound",
       "version": "v0.7.1",
       "license": "MIT",
       "dependencies": {
@@ -12,7 +13,7 @@
         "@jambonz/http-authenticator": "^0.2.0",
         "@jambonz/http-health-check": "^0.0.1",
         "@jambonz/realtimedb-helpers": "^0.4.9",
-        "@jambonz/rtpengine-utils": "^0.2.2",
+        "@jambonz/rtpengine-utils": "^0.3.0-beta.3",
         "@jambonz/stats-collector": "^0.1.6",
         "@jambonz/time-series": "^0.1.6",
         "aws-sdk": "^2.1036.0",
@@ -29,8 +30,8 @@
       },
       "devDependencies": {
         "clear-module": "^4.1.1",
-        "eslint": "^7.15.0",
-        "eslint-plugin-promise": "^4.2.1",
+        "eslint": "^7.32.0",
+        "eslint-plugin-promise": "^6.0.0",
         "nyc": "^15.1.0",
         "tape": "^4.13.3"
       },
@@ -397,14 +398,14 @@
       }
     },
     "node_modules/@eslint/eslintrc": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.4.0.tgz",
-      "integrity": "sha512-2ZPCc+uNbjV5ERJr+aKSPRwZgKd2z11x0EgLvb1PURmUrn9QNRXFqje0Ldq454PfAVyaJYyrDvvIKSFP4NnBog==",
+      "version": "0.4.3",
+      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.4.3.tgz",
+      "integrity": "sha512-J6KFFz5QCYUJq3pf0mjEcCJVERbzv71PUIDczuh9JkwGEzced6CO5ADLHB1rbf/+oPBtoPfMYNOpGDzCANlbXw==",
       "dependencies": {
         "ajv": "^6.12.4",
         "debug": "^4.1.1",
         "espree": "^7.3.0",
-        "globals": "^12.1.0",
+        "globals": "^13.9.0",
         "ignore": "^4.0.6",
         "import-fresh": "^3.2.1",
         "js-yaml": "^3.13.1",
@@ -478,6 +479,24 @@
         "node": ">=6"
       }
     },
+    "node_modules/@humanwhocodes/config-array": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/@humanwhocodes/config-array/-/config-array-0.5.0.tgz",
+      "integrity": "sha512-FagtKFz74XrTl7y6HCzQpwDfXP0yhxe9lHLD1UZxjvZIcbyRz8zTFF/yYNfSfzU414eDwZ1SrO0Qvtyf+wFMQg==",
+      "dependencies": {
+        "@humanwhocodes/object-schema": "^1.2.0",
+        "debug": "^4.1.1",
+        "minimatch": "^3.0.4"
+      },
+      "engines": {
+        "node": ">=10.10.0"
+      }
+    },
+    "node_modules/@humanwhocodes/object-schema": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/@humanwhocodes/object-schema/-/object-schema-1.2.1.tgz",
+      "integrity": "sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA=="
+    },
     "node_modules/@istanbuljs/load-nyc-config": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
@@ -562,19 +581,19 @@
       }
     },
     "node_modules/@jambonz/rtpengine-utils": {
-      "version": "0.2.2",
-      "resolved": "https://registry.npmjs.org/@jambonz/rtpengine-utils/-/rtpengine-utils-0.2.2.tgz",
-      "integrity": "sha512-CzqqbSmXMpH6rr80mMCoslXwfAmy1kYgTNVQReQl9O8qyELVe/mYK2bKhMmztIL3K6JenmAnfQE7zOfnnO49hw==",
+      "version": "0.3.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@jambonz/rtpengine-utils/-/rtpengine-utils-0.3.0-beta.3.tgz",
+      "integrity": "sha512-3aL9tdGOmHo/RUvxfXxawLpxHFHR0iunMzha0oNfINjUh6AFwAbiTch6PnXMD1mVU9j8QVvGanV1FiVsRL/yOw==",
       "dependencies": {
         "debug": "^4.3.1",
-        "rtpengine-client": "^0.3.0",
+        "rtpengine-client": "^0.3.2",
         "ws": "^8.4.2"
       }
     },
     "node_modules/@jambonz/rtpengine-utils/node_modules/rtpengine-client": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/rtpengine-client/-/rtpengine-client-0.3.0.tgz",
-      "integrity": "sha512-uencOR5wXY1/EuBuNbLS5SloKesx++vclD4bmPDg8y/+OaqtCw/vun3RDJKG1tH6gMDoAoEuETTAIHYmwixxmQ==",
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/rtpengine-client/-/rtpengine-client-0.3.2.tgz",
+      "integrity": "sha512-RbttcmoQxtYU7VCHZR2RHE3eMFShZqq8cMRfPAGw42o4TDdET4Ih4OC0NicVyVRpzlRlzfysTvFWQNXVth03wQ==",
       "dependencies": {
         "bencode": "^2.0.1",
         "uuid": "^8.2.0",
@@ -738,9 +757,9 @@
       }
     },
     "node_modules/acorn-jsx": {
-      "version": "5.3.1",
-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.1.tgz",
-      "integrity": "sha512-K0Ptm/47OKfQRpNQ2J/oIN/3QYiK6FwW+eJbILhsdxh2WTLdl+30o8aGdTbm5JbffpFFAg/g+zi1E+jvJha5ng==",
+      "version": "5.3.2",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.2.tgz",
+      "integrity": "sha512-rq9s+JNhf0IChjtDXxllJ7g41oZk5SlXtp0LHwyA5cejwn7vKmKp4pPri6YEePv2PU65sAsegbXtIinmDFDXgQ==",
       "peerDependencies": {
         "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
       }
@@ -1780,28 +1799,31 @@
       }
     },
     "node_modules/eslint": {
-      "version": "7.21.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.21.0.tgz",
-      "integrity": "sha512-W2aJbXpMNofUp0ztQaF40fveSsJBjlSCSWpy//gzfTvwC+USs/nceBrKmlJOiM8r1bLwP2EuYkCqArn/6QTIgg==",
+      "version": "7.32.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.32.0.tgz",
+      "integrity": "sha512-VHZ8gX+EDfz+97jGcgyGCyRia/dPOd6Xh9yPv8Bl1+SoaIwD+a/vlrOmGRUyOYu7MwUhc7CxqeaDZU13S4+EpA==",
       "dependencies": {
         "@babel/code-frame": "7.12.11",
-        "@eslint/eslintrc": "^0.4.0",
+        "@eslint/eslintrc": "^0.4.3",
+        "@humanwhocodes/config-array": "^0.5.0",
         "ajv": "^6.10.0",
         "chalk": "^4.0.0",
         "cross-spawn": "^7.0.2",
         "debug": "^4.0.1",
         "doctrine": "^3.0.0",
         "enquirer": "^2.3.5",
+        "escape-string-regexp": "^4.0.0",
         "eslint-scope": "^5.1.1",
         "eslint-utils": "^2.1.0",
         "eslint-visitor-keys": "^2.0.0",
         "espree": "^7.3.1",
         "esquery": "^1.4.0",
         "esutils": "^2.0.2",
+        "fast-deep-equal": "^3.1.3",
         "file-entry-cache": "^6.0.1",
         "functional-red-black-tree": "^1.0.1",
-        "glob-parent": "^5.0.0",
-        "globals": "^12.1.0",
+        "glob-parent": "^5.1.2",
+        "globals": "^13.6.0",
         "ignore": "^4.0.6",
         "import-fresh": "^3.0.0",
         "imurmurhash": "^0.1.4",
@@ -1809,7 +1831,7 @@
         "js-yaml": "^3.13.1",
         "json-stable-stringify-without-jsonify": "^1.0.1",
         "levn": "^0.4.1",
-        "lodash": "^4.17.20",
+        "lodash.merge": "^4.6.2",
         "minimatch": "^3.0.4",
         "natural-compare": "^1.4.0",
         "optionator": "^0.9.1",
@@ -1818,7 +1840,7 @@
         "semver": "^7.2.1",
         "strip-ansi": "^6.0.0",
         "strip-json-comments": "^3.1.0",
-        "table": "^6.0.4",
+        "table": "^6.0.9",
         "text-table": "^0.2.0",
         "v8-compile-cache": "^2.0.3"
       },
@@ -1833,12 +1855,15 @@
       }
     },
     "node_modules/eslint-plugin-promise": {
-      "version": "4.3.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-promise/-/eslint-plugin-promise-4.3.1.tgz",
-      "integrity": "sha512-bY2sGqyptzFBDLh/GMbAxfdJC+b0f23ME63FOE4+Jao0oZ3E1LEwFtWJX/1pGMJLiTtrSSern2CRM/g+dfc0eQ==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-promise/-/eslint-plugin-promise-6.0.0.tgz",
+      "integrity": "sha512-7GPezalm5Bfi/E22PnQxDWH2iW9GTvAlUNTztemeHb6c1BniSyoeTrM87JkC0wYdi6aQrZX9p2qEiAno8aTcbw==",
       "dev": true,
       "engines": {
-        "node": ">=6"
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "peerDependencies": {
+        "eslint": "^7.0.0 || ^8.0.0"
       }
     },
     "node_modules/eslint-scope": {
@@ -1853,6 +1878,14 @@
         "node": ">=8.0.0"
       }
     },
+    "node_modules/eslint-scope/node_modules/estraverse": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.3.0.tgz",
+      "integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==",
+      "engines": {
+        "node": ">=4.0"
+      }
+    },
     "node_modules/eslint-utils": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-2.1.0.tgz",
@@ -1876,13 +1909,24 @@
       }
     },
     "node_modules/eslint-visitor-keys": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-2.0.0.tgz",
-      "integrity": "sha512-QudtT6av5WXels9WjIM7qz1XD1cWGvX4gGXvp/zBn9nXG02D0utdU3Em2m/QjTnrsk6bBjmCygl3rmj118msQQ==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-2.1.0.tgz",
+      "integrity": "sha512-0rSmRBzXgDzIsD6mGdJgevzgezI534Cer5L/vyMX0kHzT/jiB43jRhd9YUlMGYLQy2zprNmoT8qasCGtY+QaKw==",
       "engines": {
         "node": ">=10"
       }
     },
+    "node_modules/eslint/node_modules/escape-string-regexp": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-4.0.0.tgz",
+      "integrity": "sha512-TtpcNJ3XAzx3Gq8sWRzJaVajRs0uVxA2YAkdb1jm2YkPz4G6egUFAyA3n5vtEIZefPk5Wa4UXbKuS5fKkJWdgA==",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/espree": {
       "version": "7.3.1",
       "resolved": "https://registry.npmjs.org/espree/-/espree-7.3.1.tgz",
@@ -1927,14 +1971,6 @@
         "node": ">=0.10"
       }
     },
-    "node_modules/esquery/node_modules/estraverse": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.2.0.tgz",
-      "integrity": "sha512-BxbNGGNm0RyRYvUdHpIwv9IWzeM9XClbOxwoATuFdOE7ZE6wHL+HQ5T8hoPM+zHvmKzzsEqhgy0GrQ5X13afiQ==",
-      "engines": {
-        "node": ">=4.0"
-      }
-    },
     "node_modules/esrecurse": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.3.0.tgz",
@@ -1946,18 +1982,10 @@
         "node": ">=4.0"
       }
     },
-    "node_modules/esrecurse/node_modules/estraverse": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.2.0.tgz",
-      "integrity": "sha512-BxbNGGNm0RyRYvUdHpIwv9IWzeM9XClbOxwoATuFdOE7ZE6wHL+HQ5T8hoPM+zHvmKzzsEqhgy0GrQ5X13afiQ==",
-      "engines": {
-        "node": ">=4.0"
-      }
-    },
     "node_modules/estraverse": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.3.0.tgz",
-      "integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==",
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.3.0.tgz",
+      "integrity": "sha512-MMdARuVEQziNTeJD8DgMqmhwR11BRQ/cBP+pLtYdSTnf3MIO8fFeiINEbX36ZdNlfU/7A9f3gUw49B3oQsvwBA==",
       "engines": {
         "node": ">=4.0"
       }
@@ -2379,11 +2407,11 @@
       }
     },
     "node_modules/globals": {
-      "version": "12.4.0",
-      "resolved": "https://registry.npmjs.org/globals/-/globals-12.4.0.tgz",
-      "integrity": "sha512-BWICuzzDvDoH54NHKCseDanAhE3CeDorgDL5MT6LMXXj2WCnd9UC2szdk4AWLfjdgNBCXLUanXYcpBBKOSWGwg==",
+      "version": "13.12.0",
+      "resolved": "https://registry.npmjs.org/globals/-/globals-13.12.0.tgz",
+      "integrity": "sha512-uS8X6lSKN2JumVoXrbUz+uG4BYG+eiawqm3qFcT7ammfbUHeCBoJMlHcec/S3krSk73/AE/f0szYFmgAA3kYZg==",
       "dependencies": {
-        "type-fest": "^0.8.1"
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@@ -8563,20 +8685,21 @@
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@@ -8800,6 +8929,20 @@
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diff --git a/package.json b/package.json
index d5c333f..ddd0f2a 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
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-    "node": ">= 10.16.0"
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@@ -29,7 +29,7 @@
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@@ -46,8 +46,8 @@
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