[SIPForum-discussion] cancel after ACK is possible?

[Manish Aggarwal]

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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