//----------------------------------- My understanded Message Flowing---------------------------------- // sipOrig ----INVITE(SDP offer)-------------------->MSC // sipOrig <---100 Trying----------------------------MSC
// MGW_Orig<---Add_Req-----------------MSC // MGW_Orig----Add_Reply/Not_Req------>MSC // MGW_Orig<---Notify_Reply------------MSC // sipOrig <---183 Session Progress(SDP answer)------MSC // MSC--------Add_Req--------->MGW_Term // MSC<---Add_Reply/Not_Req--->MGW_Term // MSC--------Notify_Reply---->MGW_Term // MSC----INVITE(SDP offer)---------------->sipTERM // MSC<---100 Trying------------------------sipTERM // sipOrig ----PRACK(SDP offer)--------------------->MSC // sipOrig <---200 OK PRACK(SDP answer)--------------MSC // MSC<---183 Session Progress(SDP answer)--sipTERM // MSC----PRACK(SDP offer)----------------->sipTERM // MSC--------Mod_Req--------->MGW_Term // MSC<-------Mod_Reply------->MGW_Term // MSC<---200 OK(PRACK)(SDP Answer)---------sipTERM // MSC<---180 Ringing(SDP offer)------------sipTERM // sipOrig <---180 Ringing---------------------------MSC----PRACK---------------------------->sipTERM On 3/3/08, christina yuen <[EMAIL PROTECTED]> wrote: > > My understanding is > > 1> if an SDP offer received in a SIP request, such as all media > streams in the SDP offer, => the SDP answer is returned in a 488 Not > Acceptable Here response and a SIP607 log is generated. > > 2> If an SDP offer received in a provisional response, such as all > media streams in the SDP offer, => it must be rejected, the SDP answer is > returned in the PRACK. > > > > Now an new SDP offer is received in a provisional response, 180 Ringing, > then the switch should reject the SDP offer in PRACK. Do you think it is > right? Thanks. > > > > Christina > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
