Sanjay Sinha (sanjsinh) wrote:
> I think it will send 200 OK to CANCEL first, to let UAC know that it has
> received it, and then act on Cancel request and send 487 for Invite.
Note that even if they are sent in that order they may not be *received*
in that order.
Paul
> Sanjay
>
> PS: I moved this to sip-implementors, where it's more appropriate.
>
>> -----Original Message-----
>> From: Stephen McVarnock [mailto:[EMAIL PROTECTED]
>> Sent: Tuesday, May 15, 2007 9:58 AM
>> To: [EMAIL PROTECTED]
>> Subject: [Sip] UAS behaviour in response to a CANCEL request
>>
>> Hi folks,
>> If a UAC sends a CANCEL request to the UAS, is the UAS
>> under any obligation for the order in which it sends it's
>> responses? i.e.:-
>>
>> It must send the 200 OK for the CANCEL before it sends the 487
>> for the INVITE request.
>>
>> or
>>
>> It must send the 487 to the INVITE before it sends the 200 OK
>> for the CANCEL request.
>>
>> Having a look at section 9 of RFC 3261, it makes no mention of
>> this which I assume implies that either situation should be
>> dealt is acceptable.
>>
>> Thanks in advance for any help supplied.
>>
>> Regards,
>> Steve
>>
>>
>>
>> --
>>
>>
>> ***********************************************************************
>> * Stephen McVarnock * Email: [EMAIL PROTECTED] *
>> * Senior Software Developer * WWW : http://www.aepona.com *
>> * Aepona Ltd., * Phone: +44 (0)28 9026 9114 *
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>> * N. Ireland * *
>> ***********************************************************************
>>
>>
>>
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>
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