Outbound Call Failure: 403 Forbidden on Registered BYO SIP Trunk
My BYO SIP Trunk is registered and incoming calls to my Vapi number work perfectly. However, all outbound calls fail immediately with the following error in the logs:
call.in-progress.error-providerfault-outbound-sip-403-forbidden
Key Evidence:
Call ID:6c67c3b2-1dc0-4ac8-9f96-7a0a0762f78d, 32ad8386-3caf-4c77-9616-8e883c82ffa8, 21c5e36e-efaf-4f45-8ea1-7cc8e42d5627
SIP Provider: PBX HOSTING
Request:
Since inbound calls work, the issue appears to be with outbound authentication/authorization on my provider's side. Please:
Check your SIP logs for the Call ID above to see why the INVITE is being rejected.
Provide the public IP addresses Vapi uses for outbound SIP traffic so I can whitelist them with my provider.
Thank you for your assistance.
call.in-progress.error-providerfault-outbound-sip-403-forbidden
Key Evidence:
Call ID:6c67c3b2-1dc0-4ac8-9f96-7a0a0762f78d, 32ad8386-3caf-4c77-9616-8e883c82ffa8, 21c5e36e-efaf-4f45-8ea1-7cc8e42d5627
SIP Provider: PBX HOSTING
Request:
Since inbound calls work, the issue appears to be with outbound authentication/authorization on my provider's side. Please:
Check your SIP logs for the Call ID above to see why the INVITE is being rejected.
Provide the public IP addresses Vapi uses for outbound SIP traffic so I can whitelist them with my provider.
Thank you for your assistance.
