Hi Ajay, in my understanding you have only two possibilities to finish this situation.
After TimerA is stopped, TimerB lost its control functionality. If Timer B expires no state will change. The first possibility is that the user from UAC stopps the situation by sending a CANCEL (hanging up if a phone). UAS will response to the CANCEL with a 200 OK and a 487 Request Terminated for the INVITE. UAC answers with an ACK. By the other possiblity there must be a proxy between. If Timer C expires the proxy sends a 408 to the UAC which answers with an ACK and the proxy sends a CANCEL to the UAS. The behaviour of the UAS is the same as above, only the proxy is answering now with an ACK. I think this are the only two possiblities. Greeting Markus Idnani Ajaykumar-AIDNANI1 <[EMAIL PROTECTED]> schrieb am 28.02.05 20:08:50: > > Hi All, > > I was reading section 17.1.1.2 of RFC 3261 and I had some basic questions, so > I thought I will ask the experts. > > 1. What is the UAC supposed to do when it is in the Proceeding state and it > does not receive any final response? The text in section 17.1.1.2 does talk > about this case. Also when I look at the flow in Firgure 5, there seems to be > no timer attached to get out of the 'Proceeding' state. There is one attached > to 'Calling' (Timer B) and 'Completed' (Timer D) states, but none to > 'Proceeding' state. So are we saying that once you get into Proceeding state > and the other end fails for some reason, the UAC is stuck. > > Or is the figure inaccurate and it should really show a Timer B associated > with one of the arrows coming out of that state? In which case my questions > would be does a provisional response reset this timer? Otherwise an INVITE > transaction would be constrained to 32secs assuming a T1 of 500ms (i.e. a > call should go from 'Calling' to 'Completed' in 32secs! > > Appreciate your responses. > > Thank you. > - Ajay > _______________________________________________ > Sip-implementors mailing list > [email protected] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors ______________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt bei WEB.DE FreeMail: http://f.web.de/?mc=021193 _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
