Hi If I have to implement RFC 4572 (connection oriented media) in pjsip, where do I start? I found a mention of custom media transport -- "Application may use their custom transport for transporting RTP/RTCP packets, or instead just use PJMEDIA's built-in transport." Also a relevant earlier post talks about creating it parallel to transport_srtp/udp. http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-June/003204.html >From what I understand, these are the steps: 1) create transport_tcp.c/.h files similar to transport_udp. All the TCP handling will happen in transport_tcp.c. 2) call pjmedia_transport_tcp_create to create multiple tcp transport objects. 3) call pjsua_media_transports_attach to use from pjsua library/app. Anything else that we should be aware of? Does anyone have sample code to share? Thanks! Kundan