Hi Ranjit, Thanks for your help . Aakash
On Sat, Dec 5, 2020 at 12:10 AM Ranjit Avasarala <ranjitka...@gmail.com> wrote: > Yes UAS can change Session-Expires value. See Section 9 in RFC 4028 > > Regards > Ranjit > > On Fri, Dec 4, 2020 at 12:37 PM akashdeep vishnoi <akashanshu...@gmail.com> > wrote: > >> Hi Ranjit >> >> My question is: can Session-Expire value be changed by 2xx response or an >> early update request in call-setup phase? >> >> Errata ID: 4744 : >> *"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 it has mentioned that 'it shall not start a new one'. Does it >> meant not to change the Session-Expire value if it is not below the >> minimum time? >> >> Thanks, >> Aakash >> >> On Fri, Dec 4, 2020 at 11:49 PM Ranjit Avasarala <ranjitka...@gmail.com> >> wrote: >> >>> Hi Akash >>> >>> The UAS does respond to INVITE with Supported: timer, with a 4xx if the >>> interval is too short or responds with a 2xx. Why do you think there >>> should be an early update? u mean a 1xx response? >>> >>> On Fri, Dec 4, 2020 at 12:05 PM akashdeep vishnoi < >>> akashanshu...@gmail.com> wrote: >>> >>>> 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
