Solved Issue with Fanvil V62 as SBC

[voipdevice]

In one location, we have a Cyta router HG8245X6-10, a 3CX SBC (Windows), and a Yealink phone. It works without any problems, but we need to replace the SBC with a Fanvil V62.
The phone was configured using auto-provisioning, but it cannot establish the tunnel. How can I check where the issue is located?

 

[Alphabetic]

You would want to up your logging on the admin console and then check logs to see if its hitting you.

check blacklisted IP, start a trace on the fanvil and check the capture.

 

[voipdevice]

Resetting the phone and reconfiguring it in the target network helped solve the issue. Previously, it was configured in another network, and the SIP proxy field was blank.