I had voice gw configured and it work fine for voice calling between the SIP soft phone. I would like it to support also video, therefore I done research on CCO and it stated IOS 12.4(11)T will support Video codec H.264. I upgrade the voice gw to the 12.4(11)T, after upgraded I am facing one problem. Where when SIP phone call to other party, it ringing...when other party pickup the call..immediately the call DROPPED. Finding no way to solve it ...I down grade it back to 12.4(12) and problem solved. I try 12.4(11)T1, also the same problem happen.
Attached is the debug at gw and the Etherreal captured while problem happen with IOS 12.4(11)T or T1