diff --git a/lib/call-session.js b/lib/call-session.js
index ef74945..34e75d0 100644
--- a/lib/call-session.js
+++ b/lib/call-session.js
@@ -7,7 +7,9 @@ const {
   nudgeCallCounts,
   roundTripTime,
   parseConnectionIp,
-  isPrivateVoipNetwork
+  isPrivateVoipNetwork,
+  isWSS,
+  //localSipPort
 } = require('./utils');
 
 const {forwardInDialogRequests} = require('drachtio-fn-b2b-sugar');
@@ -70,6 +72,9 @@ class CallSession extends Emitter {
     this.recordingNoAnswerTimeout = (process.env.JAMBONES_RECORDING_NO_ANSWER_TIMEOUT || 2) * 1000;
 
     this.isUsingPrivateNetwork = isPrivateVoipNetwork(this.req.source_address);
+
+    this.protocol = isWSS(req) ? 'wss' : req.protocol;
+    //this.localSipPort = localSipPort(req);
   }
 
   get isFromMSTeams() {
@@ -227,7 +232,7 @@ class CallSession extends Emitter {
       // set Contact header based on scenario, and transport protocol
       let responseHeaders = {};
       if (this.isUsingPrivateNetwork) {
-        this.contactHeader = `<${scheme}:${this.privateSipAddress};transport=${this.req.protocol}>`;
+        this.contactHeader = `<${scheme}:${this.privateSipAddress};transport=${this.protocol}>`;
         responseHeaders = {
           ...responseHeaders,
           'Contact': this.contactHeader
@@ -244,8 +249,8 @@ class CallSession extends Emitter {
         };
       }
       else {
-        const hostport = this.srf.locals.sbcPublicIpAddress[this.req.protocol];
-        this.contactHeader = `<${scheme}:${hostport};transport=${this.req.protocol}>`;
+        const hostport = this.srf.locals.sbcPublicIpAddress[this.protocol];
+        this.contactHeader = `<${scheme}:${hostport};transport=${this.protocol}>`;
         responseHeaders = {
           ...responseHeaders,
           'Contact': this.contactHeader
diff --git a/lib/utils.js b/lib/utils.js
index 42e8978..280654b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -9,6 +9,11 @@ const isWSS = (req) => {
   return req.getParsedHeader('Via')[0].protocol.toLowerCase().startsWith('ws');
 };
 
+const localSipPort = (req) => {
+  const arr = /:(\d+)$/.exec(req.receivedOn);
+  return arr ? arr[1] : '5060';
+};
+
 const getAppserver = (srf) => {
   const len = srf.locals.featureServers.length;
   return srf.locals.featureServers[idx++ % len];
@@ -262,6 +267,7 @@ module.exports = {
   parseConnectionIp,
   isMSTeamsCIDR,
   isPrivateVoipNetwork,
-  parseHostPorts
+  parseHostPorts,
+  localSipPort
 };