[SIPForum-discussion] CANCEL request will be send from UAC to UASat that time what response UAC will get

[Robert Sparks]

On Apr 20, 2007, at 9:25 AM, XuRui wrote:

> Hi,
>
> CANCEL should not be sent after session is established.
There is a race condition where a 200-INVITE and a CANCEL can cross  
on the wire.

> If UAS does receives this CANCEL, I preferred send 481 response.
Only if the INVITE transaction has been terminated. As before - you  
do not learn if a request has actually been cancelled from the  
response to a CANCEL. You learn that from the response to the INVITE.

>
> Regards,
> Xu Rui
>
> ----- Original Message -----
> From: William Prusty
> To: discussion at sipforum.org
> Sent: Friday, April 20, 2007 2:50 PM
> Subject: [SIPForum-discussion] CANCEL request will be send from UAC  
> to UASat that time what response UAC will get
>
> Suppose call has been established . if CANCEL request will be send  
> from UAC to UAS at that time what response UAC will get
>
>
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>
> Plz answer ASAP
>
>
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> With regards
>
>                              william
>
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