Hi, UEB would have rejected the video stream in the 183 response. Gonzalo wang.libo@xxxxxxxxxx wrote:> > HI,> > I think the video will be established.The figure below shows the case.> > > 1. REINVITE(audio，vedio)> ----------------------------->> 2. 183> <-----------------------------> 3. PRACK/200 > <------------------------------>> 4. UPDATE(audio，vedio)> ----------------------------->> 5. 200(audio，vedio)> <-----------------------------> > 6. 4XX> <-----------------------------> > After step 5, UEs' precondition are met ,and the video stream is > established too.> But UE-B send 4xx to reject 4XX (step 6).> > Regards.> > > > > *Gonzalo Camarillo <Gonzalo.Camarillo@xxxxxxxxxxxx>*> > 2009-02-27 17:30> > > 收件人> wang.libo@xxxxxxxxxx> 抄送> christer.holmberg@xxxxxxxxxxxx, gao.yang2@xxxxxxxxxx, sipping@xxxxxxxx, > sipping-bounces@xxxxxxxx> 主题> Re: 答复: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: > Re: ??: Re: Closing the offer/answer rollback issue> > > > > > > > > Hi,> > > If UE-A wants to communicate with UE-B by video, but UE-B only want to> > communicate by audio.> > then UE-B rejects the video stream and the video stream is never> established.> > Cheers,> > Gonzalo> > > --------------------------------------------------------> ZTE Information Security Notice: The information contained in this mail is solely property of the sender's organization. This mail communication is confidential. Recipients named above are obligated to maintain secrecy and are not permitted to disclose the contents of this communication to others.> This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the originator of the message. Any views expressed in this message are those of the individual sender.> This message has been scanned for viruses and Spam by ZTE Anti-Spam system. _______________________________________________Sipping mailing list https://www.ietf.org/mailman/listinfo/sippingThis list is for NEW development of the application of SIPUse sip-implementors@xxxxxxxxxxxxxxx for questions on current sipUse sip@xxxxxxxx for new developments of core SIP
