On Wed, 2005-10-19 at 16:36 -0400, Paul Kyzivat wrote: > > Although I would expect it to be uncommon for a UA to "lose" a dialog- > > usage without losing its containing dialog, so there should be little > > practical penalty for having a 481 terminate the dialog. > > I gave one example that can happen in practice, of glare between two > BYEs. Sounds unlikely, but I think it could be pretty easy for them to > be synchronized around a REFER - both referror and referree deciding to > drop their call.
Hmmm. And any situation where there could be a race between the two ends to terminate a usage could result in a glare situation. For instance, a subscription can be terminated by the subscriber by a SUBSCRIBE with Expires: 0, or by the notifier by a NOTIFY with the appropriate subscription-state information. I expect there will be more of these situations. I think we then must use your interpretation, that a 481 means only to terminate the dialog-usage. Dale _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
