Iñaki Baz Castillo writes: > 1) The SUBSCRIBE arrives to the UA location. > - A calls B. > - B sends a SUBSCRIBE (Event: dialog;acll-id=xx;to-tag=xx) to A AoR. > - The proxy responsible for A receives the SUBSCRIBE and forwards it > to A location(s). Note that the proxy allows this SUBSCRIBE since the > "Event" header is "dialog" containing "call-id" and "to-tag". It could > also check if the "Expires" equals 0. So this is not a SUBSCRIBE "for > all the calls from/to A", but a SUBSCRIBE for an spedific dialog.
ok, that kind of tests are feasible for the proxy to do. > 2) The SUBSCRIBE is handled by a proxy / presence server. > - A calls B through P1 (proxy responsible for A). > - P1 includes a dialog presence agent (as pua_dialoginfo). This agent > generates a PUBLISH that is sent to the integrated (or separate) > dialog presence server (we are not speaking about a SIMPLE presence > server). So the dialog presence server is now aware of the current > dialog between A and B. this kind thing would be very hard to implement reliably. in summary, i'm in favor of this draft and suggest that it will be published as a working group document. -- juha _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
