2008/10/28 Elwell, John <[EMAIL PROTECTED]>: > Viktor, > > An interesting draft addressing a known problem space. Dan Wing has already > pointed out similarities with draft-wing-sip-e164-rrc (now expired). I fear > the present draft will not work in the presence of B2BUAs along the path of > the INVITE request, since these tend to change things like call-ID, to-tag > and from-tag. Since B2BUAs, and SBCs in particular, are the main reasons why > RFC 4474 will not work, any solution has to be able to work through these > devices.
Since the B2BUA has detailed info of both legs A and B, it is capable of doing needed changes, as replacing call-id and to-tag in Event header. Also, the B2BUA could handle the SUBSCRIBE by its own, this is, becoming a dialog presence server instead of forwarding the SUBSCRIBE to the UA. B2BUA must handle all this stuff since they are, in fact, the end point, not the UA's behind them. -- Iñaki Baz Castillo <[EMAIL PROTECTED]> _______________________________________________ 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
