Hi Asura, RFC does not allows such scenerio. In some standard implementation of stack+transaction unit, it will leads to transaction failure.
Best Regards, Manish Jain --- Achint Aggarwal <[EMAIL PROTECTED]> wrote: > Hi Asura! > > I don't think this is a scenario compliant with > 3261. > It is because for the first 200OK that was sent for > the INVITE from UAS > carrying sdp(an offer) information,UAC must generate > the answer to that > offer in the first ACK as expected by a SIP entity > we call UAS. > > If answer sdp is sent in the 2nd ACK for the first > 200OK then i guess it > leads to incomplete offer-answer model and then UAS > may behave differently > to the answer in the 2nd ACK,rejecting it perhaps. > Regards > Achint > > > > asura_hzk <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > 10/09/2006 02:41 PM > > > To > [email protected] > cc > > Subject > [Sip-implementors] two ACKs for one 200 ok? > > > > > > > > hello,friends ,I met a scenario like this > > Sip server Sip Client > INVITE(without SDP) > -------------------> > 200 OK(with SDP) > <------------------ > ACK(without SDP) > -------------------> > ACK(with SDP) > -------------------> > > The first ACK is just for stopping the > retransmitting "200 ok",I thought, > Because the second ACK should be received after the > remote client accepted > the > call.The server is not developped by ourselves,So I > dont know whether this > > implementation complies to RFC? > > Waiting for your instruction,Thank you! > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > > *********************** FSS- Confidential > *********************** > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
