> It is my understanding Timer C is only relevant to a Proxy server. Although it typically has a better mechanism for checking if dialog is alive (such as sending an UPDATE), the UAC can also benefit from the periodic 1xx associated with restarting timer C. The periodic provisional response is discussed within rfc3262 13.3.1.1 and rfc3262 section 3.
> I am interested in what the UAC should be doing under the > following circumstances: > > UAC sends INVITE > UAS/Proxy sends 1xx > UAS/Proxy dies. > > I think Hanifa Mohammed pointed me to the right section > here (i.e. section 20.19 ). The Expires header tells the > Stack what to do. The Expires header imposes a UAC chosen INVITE expiration time instead of attempting to know if the call is really still progressing. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
