BYO SIP Trunking incoming call issue

Hi, I am trying to add a phone number from a thrid-party provider. VAPI requires to create a SIP trunk for this. I did that, using the BYO SIP Trunk. I have configured the authentication using my provider's domain, username, and password. However, the provider says it isn't registered - and VAPI AI bot says that for incoming calls, it doesn't have to, SIP trunking is for outbound only. I tried a test outbound call, it still doesn't work, but it's not a priority for me.
Back to incoming calls: on my provider's platform, I see the test inbound calls that should have been answered by the assistant Riley (I am just using this for testing and not configured any assistants specifically) have status Congestion.
I am forwarding the incoming calls from my provider to VAPI as explained in the docs, phone number@sip.vapi.ai. So I am not sure what to do now
Was this page helpful?