Hi Kirill, If offer-answer is completed (183 sdp in ur case) before 200/ok is sent ,then 200/ok should not carry answer sdp.
regards, siddhu > Hello Everyone, > > could someone please clarify the following situation: the INVITE is > first answered with "183 Session Progress" containing an SDP answer, and > the final "200 OK" does not contain any SDP. RFC 3261 reads (sect. > 13.3.1.4): > =================== > If the INVITE request contained an offer, and the UAS had not yet > sent an answer, the 2xx MUST contain an answer. If the INVITE did > not contain an offer, the 2xx MUST contain an offer if the UAS had > not yet sent an offer. > =================== > > So, is 200 OK without SDP valid when SDP answer arrived in "183 Session > Progress"? Or is reliability of provisional responses mandatory in this > case? > > Thanks in advance, > Kirill > > > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
