On Tue, 2008-12-09 at 09:41 -0500, Paul Kyzivat wrote: > Well, since the draft only talks about correlating dialogs, the issue > with MESSAGE only comes when using MESSAGE in-dialog. > > While it isn't *forbidden* to use MESSAGE in a dialog, that technique > was rejected by the WG for session mode IM. Also, the last I knew, at > least Microsoft's use of MESSAGE in-dialog also used a special m-line in > SDP to negotiate doing so. > > Establishing a dialog without media, to be used for exchanging MESSAGE > hasn't been formally defined. It would be problematic - some kind of > signaling would be needed to indicate that the intent is to exchange > MESSAGEs. If you have that, then it could probably be used to combine > the media. Certainly if you have a dialog with no media you can make > another offer to add voice or video. But if you tagged each of a long series of out-of-dialog MESSAGE requests with the same context-id, they'd all get displayed in the same communication context at the recipient, even if each MESSAGE had a unique call-id. (In this, I'm modeling such a MESSAGE as "a dialog of one request", which I think is more or less implicit in SIP.) Dale _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP
