Hello, We’re experiencing an issue integrating the phone number provided by our local SIP trunk provider. The provider has checked their side and confirmed the following: - For incoming calls, VAPI is returning: SIP/2.0 401 Unauthorized. - For outgoing calls, the provider expects the From header to use the format sipaccount@sip.provider.com, but VAPI is sending phonenumber@44.229.228.186 instead. As a result, VAPI receives the following error: call.in-progress.error-providerfault-outbound-sip-403-forbidden. Our org id: 0c72eb92-cfc0-4943-98d5-7d71788b5134 Could you please advise how we can resolve this and correctly configure the integration?

Hi Pablito, Thanks for the detailed information — this helps a lot. The changes you're requesting will require an internal update on our side, and this process can take a bit of time. We can absolutely get it started for you. To proceed, could you let me know which specific SIP credential you’d like us to update/switch? Once we have that, we’ll begin the configuration on our end. Looking forward to your reply!