On 11/25/2010 6:15 AM, Tarun2 Gupta wrote:
> Hi All
>
> Consider the following scenario:
>
>
>   1.  Call connected between A and B.
>   2.  A holds the call with a=sendonly.
>   3.  B sends 200 ok with a=recvonly.
>   4.  B again holds the call with a=inactive.
>   5.  What should A send in 200 ok response (a=sendonly or a=inactive) ??

Inactive

>   6.  B resumes the call with a=recvonly.

While that will work in most cases, it would be preferable for B to 
resume the call with a=sendrecv. (This is assuming that B is ready and 
able to send as well as receive.

>   7.  A sends 200 ok with a=sendonly.

If A still desires the call to be on hold, then A will indeed answer 
with sendonly, whether the offer had been recvonly or sendrecv.

>   8.  A again resumes the call with a=sendrecv.
>   9.  What should B send in 200 ok response (a=recvonly or a=sendrecv) ??

I think we have established that B no longer wishes the call to be on 
hold, so it should indeed answer with sendrecv.

There is a more complete explanation of this in 
http://www.ietf.org/id/draft-ietf-sipping-sip-offeranswer-13.txt.

        Thanks,
        Paul

> Regards,
> Tarun Gupta
> Aricent
>
>
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