Proxies use Timer C (defined in rfc3261). Endpoints can use something similar to Timer C; however SIP does not require the client to use Timer C. Endpoints can send mid dialog requests such as UPDATE to check the dialog status.
> -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of Sumant Gupta > Sent: Thursday, April 25, 2013 6:33 AM > To: [email protected] > Subject: [Sip-implementors] Ringback is not stopped due to invalid > 200OK response > > Hi All, > > I am facing an issue in the below mentioned scenrio: > > My UE is sending an INVITE request and it recieves 180 Ringing > response(remote party phone in ringing) and i am hearing ringback tone. > After few more seconds my UE recieves 200OK( remote party ringing stops > as > the remote user goes offhook). > > Now the problem occurs when few fields in 200 OK response are invalid > as a > result message parsing is failed by my UE and continously ringback > tone > is heard it not stopping (since the parsing has failed). > > As per RFC i am not seeing any timer in case i could stop this ringback > tone.What other mechanism can be implemented in the above scenario? > > Regards > Sumant _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
