If you read the RFC it already defines TIMER C for this purpose i.e. the proxy INVITE transaction timeout which should be at least 3 minutes.
Non reliable provisional responses must be retransmitted every one minute. Reliable provisional responses must be retransmitted every 2 and a half minutes (RFC 3262). So I think when TIMER C fires the proxy has the option to terminate the INVITE transaction and it should serve your purpose. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ashutosh Prakash Sent: Tuesday, August 02, 2005 10:45 AM To: [email protected] Subject: [Sip-implementors] RE: Doubts in INVITE Client Transaction Hi, In the Proceeding state one timer which can be named as protection timer can be started. This timer will have life till stack receives the Final response. Once the final response received, this timer must be stopped. If the link is down then this timer will fire & transaction will be moved to terminate state. The value of this timer can be configured by the stack user depending upon the network. One important thing is that this timer has to be restarted whenever stack receives 1xx response. Hope the above can clarify your doubt. Thanks & Regards Ashutosh. ------------------------------ Message: 8 Date: Mon, 01 Aug 2005 16:38:57 +0800 From: Pang Xiaogang-r63373 <[EMAIL PROTECTED]> Subject: [Sip-implementors] Doubts in INVITE Client Transaction Cc: [email protected] Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi all, I have a simple question while reading chapter 17.1.1 (INVITE client transaction) of RFC3261. From Figure 5, we can see that there is no active timer in "Proceeding" state. My question is if the net link is broken while the transaction is in "Proceeding" state, how the transaction can transfer to "Terminated" state? Regards, David ------------------------------ _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors End of Sip-implementors Digest, Vol 29, Issue 1 *********************************************** _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
