I'm deploying a product called FaxCore which is a fax server with the BrookTrout SR140 software fax board.
I have the fax server communicating with my CM7.1 publisher via an unsecure SIP trunk. I can send faxes internaly via 4 digit dial to the fax server. It works fine.
The problem I have is when sending a fax to the sax server from the PSTN though my 2811 MGCP gateway. The fax server answers and I can here the fax training going on. I see G.711 packets between the gateway and fax server. The fax fails everytime. I do have T.38 enabled at the gateway.
Does anyone have any ideas? What CM logs should I look at?