In initial Invite request, UAC is sending a Session-Expires header. After receiving this request, UAS will know that session timer negotiation is ongoing. Can UAS send an early update with a different value in Session-Expires?
Thanks, Aakash On Fri, 4 Dec 2020, 22:40 Ranjit Avasarala, <ranjitka...@gmail.com> wrote: > Hi Aakash > > how will UAC or UAS know if another negotiation for session timer is > ongoing? do u mean multiple INVITEs are sent from UAC? > > Regards > Ranjit > > On Fri, Dec 4, 2020 at 11:01 AM akashdeep vishnoi <akashanshu...@gmail.com> > wrote: > >> Hi, >> >> I have a little confusion in this : >> -------------------------------- >> Errata ID: 4744 >> Status: Reported >> Type: Technical >> Publication Format(s) : TEXT >> Reported By: Chao Wang >> Date Reported: 2016-07-19 >> >> Section 3 says: >> A UAC starts by sending an INVITE. This includes a Supported header field >> with the option tag 'timer', indicating support for this extension >> >> It should say: >> A UAC starts by sending an INVITE. This includes a Supported header field >> with the option tag 'timer', indicating support for this extension.If UAC >> or UAS knows one negotiation of session timer is ongoing, it SHALL not >> start a new one. >> >> >> >> ------------------------------------------------------------------------------- >> As per above explanation, I want to know if* Session Expire timer value >> can >> be changed by UAS/UAC by sending early UPDATE* before Call is established >> when INVITE request already has one timer value. >> >> Thanks, >> Aakash >> _______________________________________________ >> 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
