答复: Re: 答复: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: ??: Re: Closing the offer/answer rollback issue

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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

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Re: 答复: Re: ??: Re: [Sipping] ??: 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


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