On Tue, 2009-04-21 at 12:57 +0000, SungWoo Lee wrote: > In case of answering back with 200 OK message, the answerer can figure > out the destination rtp port number after checking where the received > rtp packets are coming from. No matter what rtp port is used in the > dummy router, the answerer simply use the port number as a destination > rtp port and the router is supposed to deliver the packets to the SIP > station.
There is no assurance that this works. The SDP addresses contain the ports at which the two endpoints *receive* RTP, but there is no requirement that they *send* RTP from those same ports. (Although in many cases, SIP systems do send and receive RTP using the same ports.) Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
