We are seeing inbound calls to a phone number provisioned through Retell being rejected with the SIP 486 Rejected response.
The number is correctly provisioned in our Retell account and associated with an agent, but inbound calls are being rejected by Retell before the call is established.
The SIP response we receive is:
SIP/2.0 486 Rejected
The rejection appears to be coming from Retell.
We have verified the phone number and agent configuration, but have not been able to identify what is causing Retell to reject the call.
If useful, I can provide an anonymized SIP trace and the corresponding timestamps privately.