This scenario is very rare to happen in real world but the scenario where in 100OK and 180Ringing have been received but 200OK not and no early dialog case is there. That case is most probably candidate for sending a CANCEL in real world. Because between 180 ringing and 200OK there is a long time of user interaction. (picking up the call).
Regards Nitin Arora On 3/27/08, Bi Ran <[EMAIL PROTECTED]> wrote: > > Will this happen in the real world? UAC will send Cancel only if a > provisional response has been received. Why didn't the UAS create the > dialog > during such a 'long' time? > > -------------------------------------------------- > From: <[EMAIL PROTECTED]> > Sent: Thursday, March 27, 2008 6:20 PM > To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; > <[email protected]> > Subject: Re: [Sip-implementors] To Tag in 200OK(CANCEL) > > > And why the To tag is MUST in such a case, even dialog is not > > established at all? > > > > Alex Zhang > > ESN: 6-554-8782 > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > > [EMAIL PROTECTED] > > Sent: Thursday, March 27, 2008 6:14 PM > > To: [EMAIL PROTECTED]; [email protected] > > Subject: Re: [Sip-implementors] To Tag in 200OK(CANCEL) > > > > But, will the dialog state be changed to what after the To tag is > > include and sent? > > > > Alex Zhang > > ESN: 6-554-8782 > > > > > > -----Original Message----- > > From: srinivas [mailto:[EMAIL PROTECTED] > > Sent: Thursday, March 27, 2008 5:58 PM > > To: Alex Zhang (GDNTRND); [email protected] > > Subject: RE: [Sip-implementors] To Tag in 200OK(CANCEL) > > > > Yes, it must include the To-Tag in 200 Ok for Cancel Msg, even if the > > 200 Ok > > for cancel has generated by Stateful Proxy it supposed to generate to > > tag > > for the same because it supposed behave as a UAS while generating that > > response. > > > > Regards, > > Srinivas CH, > > Huawei Technologis India Pvt Ltd, > > 1st Floor 'A' Tower,Diamond District, > > Airport Road, Bangalore-8, > > Contact: (Off) 080-41117676 ext: 3220 (Mob) > > +919448865786. > > > > > > 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 > > [EMAIL PROTECTED] > > Sent: Thursday, March 27, 2008 1:49 PM > > To: [email protected] > > Subject: [Sip-implementors] To Tag in 200OK(CANCEL) > > > > Hi All, > > > > > > > > Is is mandatory that the To Tag must be included by the UAS in the > > 200OK(CANCEL) even if the dialog is not established yet? I.E, as below: > > > > > > > > UAC UAS > > > > |---------- Invite ------------------------------->| > > > > |<--------- 100 Trying -------------------------| > > > > |----------- CANCEL ------------------------->| > > > > |<----------- 200OK(CANCEL, To Tag)-----| > > > > > > > > alex > > > > > > > > _______________________________________________ > > 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 > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
