There is a SIP based multiparty conference with a focus - every participant is connected using a SIP dialog to a central focus, which mixes/switches Media sent by the participants. One of the participants wants the focus to fetch e.g. a picture / an audio clip from an HTTP server / an RTSP server and play it to the conference participants using their media streams negotiated in SIP dialogs. Hope this makes this use case clearer.
So, absolutely no variation on INVITE or UPDATE is reasonable here. Maybe some sort of new INFO package would work.Or, a variation of the MEDICATRL approach (focus subscribes to media control events at UA, receives media control commands as NOTIFY).
Or, a completely non-SIP mechanism. -- Dean _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors at cs.columbia.edu for questions on current sip Use sipping at ietf.org for new developments on the application of sip