Hi, >>>Now, I don't know why the 2xx response's SDP should be ignored. >>>Maybe someone can think of a scenario where not ignoring >>>the 2xx SDP would cause an error. ?? >> >>If you have already received SDP on the same dialog as the >>200 SDP, and you are listening to the media associated to that dialog, it >>should not cause an error - assuming the sender of the SDP behaves correctly. > >You are talking about the standards again, are you not? > >What I mean is that clearly the SIP protocol has been >designed this way because of some kind of problem that would >be caused if it wasn't done this way. So, what are the problems? What is an >example that illustrates the problems?
When SIP was "designed" there was no such thing as reliable provisional responses etc. So, the only way to send the SDP answer reliable was by using the 200 OK. The SDP sent in the unreliable 18x is only a "preview". Regards, Christer _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
