Hi Amrita, Reading the RFC 3312, I don’t see reference to do a precondition negotiation after the call is connected. All precondition related to offer/answer are completed prior to the call gets connected. If you stick with offer/answer approach, the precondition failure in Re-INVITE does mean, the previous offer/answer shall apply and you have to rollback to the negotiated offer/answer in Initial Invite.
Thanks, Neel > -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of amrita > chaudhary > Sent: Friday, July 22, 2016 10:10 AM > To: [email protected] > Subject: [Sip-implementors] Precondition negotiation in re-INVITE > > Hi, > Is it possible to do precondition negotiation in re-INVITE when first leg of > the > call is established?Scenario: AS connects A-party to C-party after B-party > (which was in conversation with A) is released.A, B and C are VoLTE > terminals. > Does anybody has done this in their implementation. > > Regards,Amrita > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
