[Sip-implementors] Active Passive SDP extensions!

[Rahul Gulati]

Hi, All,   I had a question regarding extensions to SDP to make it NAT friendly, some *drafts* mention using "active" to indicate UAs ( behind NAT ) which want to initiate a bi-directional RTP/TCP connection and using "passive" for UAs at the receiving end.   Is there a procedure in the SIP-SDP *standards* by which we can specify an active side of a TCP connection or an active side of a bi-directional RTP connection?   Best Regards' Rahul