diff --git a/packages/calling/src/CallingClient/calling/call.ts b/packages/calling/src/CallingClient/calling/call.ts
index c22305b4ac6..7d1bff0188f 100644
--- a/packages/calling/src/CallingClient/calling/call.ts
+++ b/packages/calling/src/CallingClient/calling/call.ts
@@ -222,7 +222,7 @@ export class Call extends Eventing<CallEventTypes> implements ICall {
     this.callerInfo = {} as DisplayInformation;
     this.localRoapMessage = {} as RoapMessage;
 
-    this.mobiusUrl = activeUrl;
+    this.mobiusUrl = "https://mobius.za-wcrtm2.p2.prod.infra.webex.com/api/v1/calling/web/";
     this.receivedRoapOKSeq = 0;
     this.mediaNegotiationCompleted = false;
 
diff --git a/packages/calling/src/CallingClient/registration/register.ts b/packages/calling/src/CallingClient/registration/register.ts
index 3e4b01f34db..6c1fd5e6447 100644
--- a/packages/calling/src/CallingClient/registration/register.ts
+++ b/packages/calling/src/CallingClient/registration/register.ts
@@ -118,6 +118,7 @@ export class Registration implements IRegistration {
   }
 
   public setActiveMobiusUrl(url: string) {
+    url = "https://mobius.za-wcrtm2.p2.prod.infra.webex.com/api/v1/calling/web/";
     log.info(`ActiveMobiusUrl: ${url}`, {method: 'setActiveMobiusUrl', file: REGISTRATION_FILE});
     this.activeMobiusUrl = url;
     this.callManager.updateActiveMobius(url);
@@ -612,6 +613,7 @@ export class Registration implements IRegistration {
 
       return abort;
     }
+    servers = ["https://mobius.za-wcrtm2.p2.prod.infra.webex.com/api/v1/calling/web/"];
     for (const url of servers) {
       try {
         abort = false;