[SIPForum-discussion] cancel after ACK is possible?

[shiba shankar rout]

After establishment of call , CANCEL has  no meaning. It should be only BYE.
Before establishment of call, U can send  CANCEL.

Thanks-
S S  Rout

On Wed, Apr 29, 2009 at 10:21 PM, Manish Aggarwal <maaggarwal at gmail.com>wrote:

> 3261 says ---
>
> CANCEL has no effect on a request to which a UAS has
>    already given a final response.
>
>
> So, if UAC has received a 2XX response to INVITE, than CANCEL will not have
> any effect, because there is no "pending" request.
>
>
> -Manish
>
>
>
>
> On Wed, Apr 29, 2009 at 5:12 AM, Jyothi Laxmish <jyothil at techmahindra.com>wrote:
>
>>  Hi all
>>
>>              (1)  Is it possible to send a CANCEL message when call is in
>> established stage? ( INV to ACK )
>>
>>
>>
>>                        I am receiving 481 call Leg/Transaction does not
>> exists. Weather this a correct behaviour?
>>
>>
>>
>> Regards
>>
>> Jyothi
>>
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