Hi Mark, until now such a retention indication was not discussed. It's clear that there will be a temporal relationship between failed call and CC request, but the question is if we really have to indicate this via SIP?
If we say that about 20 s should be enough to activate CC, incl. time for signalling and user interaction, the definition of a 20 s retention timer at the CC agent should be sufficient to prevent the expiry of the possibility for CC. BR, Martin > -----Ursprüngliche Nachricht----- > Von: [email protected] [mailto:[email protected]] > Im Auftrag von Mark Michelson > Gesendet: Mittwoch, 5. August 2009 01:52 > An: [email protected] > Betreff: [BLISS] draft-ietf-bliss-call-completion-04 > Recommendation for retention time? > > Hi group, > > I've been reading through > draft-ietf-bliss-call-completion-04, and there is a piece of > information that I have been having difficulty locating. When > a cc monitor sends a final response to an INVITE that > indicates that CCBS/CCNR/CCNL may be requested, is there a > way that an expiration time may be indicated in this response? > > I realize that as a cc monitor, I don't necessarily have to > remember the original failed call forever, but I would think > that it would be possible to indicate to an upstream element > that its opportunity to request call completion services has > expired. I did not see such a capability mentioned in the > latest call completion draft, so I was wondering if such a > facility may be considered. > Or was this sort of facility left out of the draft for a > specific reason? > > I apologize in advance if this topic has surfaced in previous > discussions, but looking through the list archives, google, > and the draft itself did not give me an answer to my question. > > Thanks for your time, > Mark Michelson > _______________________________________________ > BLISS mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/bliss > _______________________________________________ BLISS mailing list [email protected] https://www.ietf.org/mailman/listinfo/bliss
