Hello, All!

We are using Kamailio as Webrtc to SIP proxy.

Clinet's Chrome browser needs to have rtcp-mux option to work correct, so we are adding it in RTPENGINE->WS direction as:

rtpengine_manage("trust-address replace-origin replace-session-connection rtcp-mux-offer rtcp-mux-accept ICE=force RTP/SAVPF");

Also we need to remove it in RTPENGINE->PSTN direction, we are trying to do it like this:

rtpengine_manage("trust-address replace-origin replace-session-connection rtcp-mux-demux ICE=remove RTP/AVP");

But it does not work for us and a=rtcp-mux option in SDP goes to the SIP provider.