On 10/29/13 9:55 AM, Sourav Dhar Chaudhuri wrote:
> Hi,
> I need the expected response for the Call scenario mentioned below
>
> 1) UAC sends INVITE request with SDP
>
> 2) UAS sends 180 ringing to UAC
>
> 3) Then UAS sends 200 OK fo with SDP response INVITE .
>
> 4) Now after receiving 200 OK response by UAC. it generates UPDATE request
> with same SDP mentioned in STEP 1 towards UAS. Is it a valid behavior?
>
> 5) Now what should be the response from UAS for that UPDATE request ??
>
> After sending the UPDATE request UAC has also also ACK request for 200 OK
> response.
The UAS is receiving the UPDATE before the ACK?
The UPDATE seems silly, but not *wrong*.
The UAS receiving the UPDATE before the ACK isn't proof that they were
sent in that order. And even if they were it isn't really wrong as long
as the ACK is sent in a timely way.
As far as what the UAS should respond, this is a new offer. All the same
rules apply as if it were sent long after the INVITE transaction completed.
Thanks,
Paul
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