Do any of the you, the Cisco Community, have a successful UC520 to Voiceflex SIP Trunk inbound calls working? If you have, can you post some configs to help out. I have successful outbound calls working including DTMF (using dtmf-relay sip-notify under the dial-peer).
The main problem is inbound calls. I get a SIP 2/0 404 not found when I debug. Basically saying that the incoming number is not matching. I can get this to work on any other IP PBX but not on Cisco. Voiceflex have been helpful in sending me some sip traces from their end and they get SIP 2/0 500 server error.
Any help on this matter is really appreciated.