Hi If the dialog is active, then there is no need of keep alive. OPTIONS method is used to know the status of a particular endpoint - similar to the ping utility.
Regards Ranjit -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Sumit Jindal Sent: Friday, May 21, 2010 4:07 PM To: sip-implementors@lists.cs.columbia.edu Subject: Re: [Sip-implementors] UPDATE method without any SDP 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 <ran...@motorola.com> wrote: > > U could use OPTIONS for keep alive (equivalent of PING). > > > Regards > Ranjit > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of > Sunil Bhagat > Sent: Friday, May 21, 2010 2:02 PM > To: 'Satyakumar'; shya...@huawei.com; > sip-implementors@lists.cs.columbia.edu > 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:satyam_...@hyd.hellosoft.com] > Sent: Friday, May 21, 2010 12:27 PM > To: Sunil Bhagat; shya...@huawei.com; > sip-implementors@lists.cs.columbia.edu > 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" <subha...@cisco.com> > To: <shya...@huawei.com>; <sip-implementors@lists.cs.columbia.edu> > 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:shya...@huawei.com] >> Sent: Friday, May 21, 2010 11:48 AM >> To: 'Sunil Bhagat'; sip-implementors@lists.cs.columbia.edu >> 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: sip-implementors-boun...@lists.cs.columbia.edu >> [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of > Sunil >> Bhagat >> Sent: Friday, May 21, 2010 11:31 AM >> To: sip-implementors@lists.cs.columbia.edu >> 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 >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> >> _______________________________________________ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- Regards, Sumit Jindal _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
