Thanks all for all you valuable comments.
On Fri, Mar 27, 2015 at 6:54 PM, Joel Gerber <joel.ger...@corp.eastlink.ca> wrote: > Exactly. Though I will state something else, I have seen incorrectly coded > UACs that behave incorrectly in this regards. In particular, Polycom VVX > sets, when they are the refresher, will actually not send out refreshes when > they RECEIVE an inbound INFO message from the UAS, as they are recognizing it > as a refresh. > > FYI: That's a bug, not a feature! :D > > I do wish that RFC 6086 was a bit more specific. It only states INVITE or > UPDATE in-dialog transactions as refreshers, but, nowhere does it state that > they are the only ones allowed for refreshing. A little bit of wording change > would have saved a lot of headaches. > > Joel Gerber > Network Operations Specialist - Telephone > Telephone > Eastlink > joel.ger...@corp.eastlink.ca T: 519.786.1241 > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Brett > Tate > Sent: March-27-15 9:21 AM > To: isshed; sip-implementors > Subject: Re: [Sip-implementors] Sessions Expires with Info > > INFO has nothing to do with it. To avoid session expiration, a re-INVITE or > UPDATE must be used renegotiate (extend, deactivate, et cetera) the > expiration time; the corresponding request's 2xx reflects renegotiation > result. > >> -----Original Message----- >> From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip- >> implementors-boun...@lists.cs.columbia.edu] On Behalf Of isshed >> Sent: Friday, March 27, 2015 9:07 AM >> To: Joel Gerber >> Cc: sip-implementors >> Subject: Re: [Sip-implementors] Sessions Expires with Info >> >> Thanks Gerber, >> >> My query is if on receiving INFO, can the refresh timer be set on UAC >> or > INFO >> does not have anything to do with it. >> >> On Fri, Mar 27, 2015 at 6:34 PM, Joel Gerber > <joel.ger...@corp.eastlink.ca> >> wrote: >> > It is not mandated either way. It could be sent at any interval > between the >> last UPDATE/INVITE and 100 seconds. I believe it is recommended, and > standard >> practice follows, that half-life is when to send it out, but it is not >> required. >> > >> > Joel Gerber >> > Network Operations Specialist - Telephone Telephone Eastlink >> > joel.ger...@corp.eastlink.ca T: 519.786.1241 >> > >> > -----Original Message----- >> > From: sip-implementors-boun...@lists.cs.columbia.edu >> > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of >> > isshed >> > Sent: March-27-15 9:02 AM >> > To: Brett Tate >> > Cc: sip-implementors >> > Subject: Re: [Sip-implementors] Sessions Expires with Info >> > >> > Thanks everyone for the responses. >> > >> > Brett, >> > >> > Lets assume the expires value is 100. the Update/Invite will go >> > after >> > 50 seconds after message (3). right? >> > >> > Thanks, >> > >> > On Fri, Mar 27, 2015 at 4:59 PM, Brett Tate <br...@broadsoft.com> > wrote: >> >>> The INFO can be out of dialog as well. >> >> >> >> INFO is a mid-dialog request. RFC 6086 section 1. >> >> >> >> "Use of the INFO method does not constitute a separate dialog usage. >> >> INFO messages are always part of, and share the fate of, an invite >> >> dialog usage [RFC5057]. INFO messages cannot be sent as part of >> >> other dialog usages, or outside an existing dialog." >> >> >> >> >> >>> > I have a scenario where my phone has negotiated with server as >> >>> > 60 seconds expires and UAC as refreshers. >> >> >> >> For completeness, I should mention that the negotiated value is >> >> below the absolute minimum mentioned within RFC 4028 section 4. >> >> >> >> "The absolute minimum for the Session-Expires header field is 90 > seconds." >> > _______________________________________________ >> > Sip-implementors mailing list >> > Sip-implementors@lists.cs.columbia.edu >> > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >> _______________________________________________ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
