See http://www.ietf.org/id/draft-ietf-sipping-sip-offeranswer-18.txt
Bottom line is:
If you returned answer in a reliable provisional response, you are
permitted to include a copy of that answer in the 200, but you are
encouraged to *not* do so.
The UAC must be prepared for it to be there.
Thanks,
Paul
On 6/27/2011 5:58 PM, Nauman Sulaiman wrote:
> Hi,
>
> In the flow below
>
> UAC UAS
> -------------------->
> INVITE(0) require 100rel
>
> <--------------------
> 183 rel (a)
>
> --------------------->
> PRACK
> <---------------------
> 200OK
>
> <---------------------
> 200K(a) ??
> ---------------------->
> ACK
>
>
> after sending answer in 183 rel to INVITE, should the UAS send an answer
> in the 200OK to the INVITE for widest interoperability or is it best to leave
> it out. Here the OA is complete but I have seen some 3pcc sending 200OK with
> answer in this scenario. Is this optional then?
>
> Does UAC need to prepare to handle this 200OK answer and just ignore it?
> Or should it not be happening.
>
> Thanks
>
>
>
>
>
> _______________________________________________
> Sip-implementors mailing list
> Sip-implementors@lists.cs.columbia.edu
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
>
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
