>>** - At this moment UAS (which is actually a B2BUA) establishes a session >>with another >>proxy where it uses 100Rel and now it is trying to "back-enable" 100Rel in >>our call leg.
that is not possible. I don't even think 100rel makes sense for an INFO request. Also I think the lifetime of 100rel is just for the request which issued it. In other words, each request that wants 100rel has to ask for it. Anyway, if 100rel is required, the UAS could just try to ask for 100rel in its next re-INVITE. Regards, Attila -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Kashin Mihail Sent: 17 June 2009 14:11 To: [email protected] Subject: [Sip-implementors] 100Rel from UAS Hi, everybody! Is it legitimate for UAS to request reliable provisional response option after receiving INVITE without Required or Supported headers. In my case the flow is like this Inv (no 100Rel*)-> <-100 Trying <- 180 Trying (no 100Rel) ** <-INFO (Required:100Rel) 200OK(no 100Rel) ............ * - Means no 100Rel indication in the message ** - At this moment UAS (which is actually a B2BUA) establishes a session with another proxy where it uses 100Rel and now it is trying to "back-enable" 100Rel in our call leg. So is it OK for UAC to answer 200OK to INFO without 100Rel indication? Or should it send 200OK with Req:100Rel and then initiate reliable prov. Response procedure? Thanks in advance to every answerer. Mike _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
