Hi Somesh, I have question related to this.
What is the right behaviour (sending out INVITE with SDP offer) if SDP in 18x (non-reliable) and 2xx are different? Sending ACK / BYE? Ignoring 2xx SDP? Regards Markus Somesh S Shanbhag wrote: > Hi Manpreet, > > RFC 3261 section 13.2.1 has the following clause ... > > " > > If the initial offer is in an INVITE, the answer MUST be in a > reliable non-failure message from UAS back to UAC which is > correlated to that INVITE. For this specification, that is > only the final 2xx response to that INVITE. That same exact > answer MAY also be placed in any provisional responses sent > prior to the answer. The UAC MUST treat the first session > description it receives as the answer, and MUST ignore any > session descriptions in subsequent responses to the initial > INVITE > " > > So, UAC MUST treat 183 session progress as the answer and > shall ignore in subsequent responses to INVITE. > > Hope this helps > Thanks > Somesh S. Shanbhag > > > > Manpreet Singh <[EMAIL PROTECTED]> wrote: For the INVITE > transaction where the offer was sent in an INVITE and the answer coming back > in 183, would it be valid to send a new offer in the 200OK? So the question > is whether the 200OK can be used to send a "new" Offer ( different from the > answer in 183 ) for the INVITE transaction once 183 has completed the > offer/answer part of that transaction. Only UPDATE can be used for early > dialog changes as per my understanding and a 200OK still constitutes early > dialog so it wont be valid to send a new offer in 200OK? Although 200OK can > carry the same SDP as 183 which would mean nothing or would not be > considered as early dialog change in capability. > > Please correct me if I am wrong. > > Thanks > > Manpreet > _______________________________________________ > discussion mailing list > [EMAIL PROTECTED] > http://sipforum.org/mailman/listinfo/discussion > > > > ----------------------------------------- > SIMPLICITY IS THE BEAUTY. > BE NATURAL LIVE NATURAL. > ----------------------------------------- > Somesh S. Shanbhag > Focus Area - VoIP Team (FA-VoIP) > Mascon Global Communication Technologies > Enterprise of Mascon Global Limited > #59/2, 100Ft Ring Road > Banashankari II stage > Bangalore-560070 > Karnataka > INDIA > Website: http://www.mgl.com/ > ----------------------------------------- > > --------------------------------- > Do you Yahoo!? > Get on board. You're invited to try the new Yahoo! Mail Beta. > _______________________________________________ > 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
