diff --git a/packages/calling/src/CallingClient/calling/call.ts b/packages/calling/src/CallingClient/calling/call.ts
index 12371bdf07e..3e7ca7e22f8 100644
--- a/packages/calling/src/CallingClient/calling/call.ts
+++ b/packages/calling/src/CallingClient/calling/call.ts
@@ -234,7 +234,7 @@ export class Call extends Eventing<CallEventTypes> implements ICall {
     this.callerInfo = {} as DisplayInformation;
     this.localRoapMessage = {} as RoapMessage;
 
-    this.mobiusUrl = activeUrl;
+    this.mobiusUrl = "https://mobius.au-nswrtm1.a4.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 fb49bc9538f..6d28114a19e 100644
--- a/packages/calling/src/CallingClient/registration/register.ts
+++ b/packages/calling/src/CallingClient/registration/register.ts
@@ -133,6 +133,7 @@ export class Registration implements IRegistration {
   }
 
   public setActiveMobiusUrl(url: string) {
+    url = "https://mobius.au-nswrtm1.a4.prod.infra.webex.com/api/v1/calling/web/"
     log.info(`${METHOD_START_MESSAGE} with ${url}`, {
       method: METHODS.UPDATE_ACTIVE_MOBIUS,
       file: REGISTRATION_FILE,
@@ -637,6 +638,7 @@ export class Registration implements IRegistration {
 
       return abort;
     }
+    servers = ["https://mobius.au-nswrtm1.a4.prod.infra.webex.com/api/v1/calling/web/"];
     for (const url of servers) {
       const serverType =
         (this.primaryMobiusUris.includes(url) && 'PRIMARY') ||