________________________________________ From: [email protected] [[email protected]] On Behalf Of M. Ranganathan [[email protected]]
I am wondering why it is not mandatory for the UAC to attach an Expires to a dialog forming INVITE. It would seem useful for at least a couple of things: 1. Stack can know when to tear down a "dead" transaction which is stuck in Proceeding state. 2. Downstream proxy can know what the max fork expiration time can be. _______________________________________________ I think the original reason is that the Expires header is considered instructions to the UAS, and not information for the proxies along the way. In regard to dead transactions, the proxy/stack looks for periodic provisional responses (RFC 3261 section 13.3.1.1). Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
