If you want to use keep-alive thing for a INVITE dialog then there is a RFC for session refreshment procedure.
Regards, Sumit Jindal On Fri, May 21, 2010 at 4:02 PM, Avasarala Ranjit-A20990 <[email protected]> wrote: > > U could use OPTIONS for keep alive (equivalent of PING). > > > Regards > Ranjit > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Sunil Bhagat > Sent: Friday, May 21, 2010 2:02 PM > To: 'Satyakumar'; [email protected]; > [email protected] > Subject: Re: [Sip-implementors] UPDATE method without any SDP > > I meant using INFO as KeepAlive message... for refresh purpose... is > that not possible? > > Regards, > Sunil > > -----Original Message----- > From: Satyakumar [mailto:[email protected]] > Sent: Friday, May 21, 2010 12:27 PM > To: Sunil Bhagat; [email protected]; > [email protected] > Subject: Re: [Sip-implementors] UPDATE method without any SDP > > from rfc 2796, sec 2 and sec 1 as below. > > >From Sec 2 > "The INFO method is not used to change the state of SIP calls, nor does > it change the state of sessions initiated by SIP. Rather, it provides > additional optional information which can further enhance the > application using SIP." > > >From Sec 1 > "The INFO method is not used to change the state of SIP calls, or the > parameters of the sessions SIP initiates. It merely sends optional > application layer information, generally related to the session." > > Hence it is a general purpose, mid-session (Application) signalling > carrying > > sip method, Not to change any sip session params. > > Regards, > Satya > > > > ----- Original Message ----- > From: "Sunil Bhagat" <[email protected]> > To: <[email protected]>; <[email protected]> > Sent: Friday, May 21, 2010 12:06 PM > Subject: Re: [Sip-implementors] UPDATE method without any SDP > > >> Thanks. >> >> Please correct me if I am wrong, I guess INFO messages could also be > used >> for the same. >> >> >> Regards, >> Sunil >> >> -----Original Message----- >> From: shyam [mailto:[email protected]] >> Sent: Friday, May 21, 2010 11:48 AM >> To: 'Sunil Bhagat'; [email protected] >> Subject: RE: [Sip-implementors] UPDATE method without any SDP >> >> Hi, >> >> UPDATE without SDP has many use cases. Couple of them are >> >> 1) It acts as session refresh if session-refresh parameter are present >> 2) IF the caller or callee want to change the contact after the dialog > is >> established using UPDATE method you can change the same. >> >> Thanks, >> shyam >> >> > ************************************************************************ > **** >> *********** >> This e-mail and attachments contain confidential information from > HUAWEI, >> which is intended only for the person or entity whose address is > listed >> above. Any use of the information contained herein in any way > (including, >> but not limited to, total or partial disclosure, reproduction, or >> dissemination) by persons other than the intended recipient's) is >> prohibited. If you receive this e-mail in error, please notify the > sender >> by >> phone or email immediately and delete it! >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of > Sunil >> Bhagat >> Sent: Friday, May 21, 2010 11:31 AM >> To: [email protected] >> Subject: [Sip-implementors] UPDATE method without any SDP >> >> Hi All, >> >> >> >> I have a small query regarding UPDATE method. >> >> UPDATE method is used to change the session parameters. I wanted to > know, >> what is the use of sending UPDATE without any sdp. >> >> >> >> Thanks, >> >> Sunil >> >> _______________________________________________ >> Sip-implementors mailing list >> [email protected] >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> >> _______________________________________________ >> Sip-implementors mailing list >> [email protected] >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- Regards, Sumit Jindal _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
