Hi, The behavior of Timer C is defined in RFC3261 section 16.6.11, 16.7.2 and 16.8. In addition to timer C, when an INVITE is sent the regular timers are set for the transaction and the invite is retransmitted with intervals of T1, 2*T1 .... If a provisional response is received then the provisional timer is set and the retransmissions stop. The provisional timer is 180,000 and it keeps the transaction from waiting forever for a final response. My questions: 1. If no provisional response was received - the transaction will terminate after 64*T1 = 32,000 and according to the RFC timer C should be 180,000 or greater. What is the point of setting the timer after the Invite is sent, when the transaction will terminate long before this timer will expire? 2. If a provisional response was received - the provisional timer is set after provisional response is received, and it is also 180,000 - so what is the difference between the provisional timer and timer C in this case? Thanks, Adi. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
