varun wrote:
> Hi,
> If user B wants to put user A on Hold, it can send a =
> sendonly to A and expects A to return a = recvonly.
> This way there is a one way audio channel open from B
> to A.
> What if user A responds with a = inactive..is that
> valid?
Yes.
> Does it mean that media streams are on Hold in
> both directions?
It *means* exactly what it says: media is not to be sent in either
direction. It doesn't *mean* any sort of hold. (You can't really infer
the meaning from the signaling. The meaning is only known locally.)
For instance it may just be a policy of the other end that it doesn't
want to receive if it can't send.
SIP has no mechanism that tells the other party that the HOLD feature
has been invoked. The sendonly/recvonly/inactive mechanism can be *used*
when HOLD has been invoked locally, to optimize the use of the media
path. But the same mechanisms are also used for other purposes. So it is
incorrect to assume the HOLD feature has been invoked when you receive
an offer with sendonly.
Paul
> Thanks
> varun
>
>
>
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