Hi List, Can anyone please advise where sdp m = line can be modified in the source code (chan_sip.c) for example the I want to change m=audio 30490 UDP/TLS/RTP/SAVPF 0 126 to m=audio 30490 RTP/SAVPF 0 126 UDP/TLS/RTP/SAVPF to RTP/SAVPF on the response invite where in the code can this be done Regards