Hi Sanjay,
>> > RFC 3261 sec. 13.2.1 says that a UAC MUST treat the first session >> > description it receives in a reliable non-failure message as the >> > answer, >> > and MUST ignore any session descriptions in subsequent responses to >> > the >> > initial INVITE. Does it mean that if 183 has SDP in response to >> > Invite's >> > offer, it should be treated as answer and SDP in 200 OK be ignored? >> > >> Yes, assuming that the 183 was sent reliably (using PRACK), AND that >> the 200 is received within the same dialog as the 183 (the INVITE >> may have been forked to multiple servers). >> > ## Then, how about interoperability with a 2543 UAS that sends > different SDPs in 18x & 200 OK? Or is changing SDP between the two > responses not allowed even for a 2543 UAS? I don't have 2543 in front of me, and I don't remember exactly what it says. However, even if I can NOT speak for all the implementations out there, I personally can't remember that I would ever have seen an implementation sending different SDPs in 18x & 200... Regards, Christer Holmberg Ericsson Finland > > > > Sanjay. > >> >> Regards, >> >> Christer Holmberg >> Ericsson Finland >> >> >> >> >> > If yes, then how will it interoperate with a 2543 UAS that >> > generates >> > different SDPs in 18x & 200 OK (because of say, CFNA)? >> > >> > Thanks, >> > Sanjay. >> > >> > _______________________________________________ >> > Sip-implementors mailing list >> > [EMAIL PROTECTED] >> > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> > _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
