On 09/29/14 13:29, Frank Carmickle wrote:
> 
> On Sep 29, 2014, at 1:24 PM, Richard Fuchs <rfu...@sipwise.com> wrote:
> 
>> On 09/29/14 13:19, Frank Carmickle wrote:
>>>
>>> On Sep 29, 2014, at 1:14 PM, Richard Fuchs <rfu...@sipwise.com> wrote:
>>>>
>>>> This may work with rtpengine, as it will open new ports for answers come
>>>> from different endpoints. But the final two-way association for the
>>>> actual call may still end up broken, as it has no way of knowing which
>>>> client ends up receiving the call (unless they do a final re-invite).
>>>
>>> But it should see the 200.  Shouldn't that be enough?
>>
>> Unfortunately it doesn't see SIP codes, it only sees SDP bodies and some
>> particular details from the SIP message. 200 OK would be translated to
>> an "answer", but not every answer is from a 200 OK, so you can't use
>> that to break other associations. Perhaps this would be a nice addition
>> to have in the future.
> 
> I will argue that the only thing that is an answer is a 200.  A progress, 
> early media or pre_answer is a 183.  Yes both 183s and 200s need to set up 
> media but as you know there could be many 183s and only one 200.
> 
> If the UA sends an sdp with both the 183 and the 200 would this work 
> correctly?

That might just work, as the last answer rtpengine sees determines the
association with the offer.

cheers

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