I agree with what others have said. In addition:
This really isn't about the 200 OK. You are to be ready to receive as
soon as you have sent the answer SDP. This *may* be in the 200, but it
can be sooner, in a 180 or 183.
Thanks,
Paul
Rockson Li (zhengyli) wrote:
> Moveover, even RTP is sent after ACK, it might/probably arrive after RTP,
> since proxy in the middle might add Record-Route itself,
> So ACK need to traverses through proxy whereas RTP does not.
>
> -Rockson
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of I?aki Baz
> Castillo
> Sent: Saturday, September 06, 2008 10:41 PM
> To: [email protected]
> Subject: Re: [Sip-implementors] When to open RTP listen port
>
> El Sábado, 6 de Septiembre de 2008, Elison Niven escribió:
>> Hi,
>>
>> I am facing a problem that when I send a 200 OK, a remote UA
>> immediately starts sending RTP after sending the ACK before my device
>> has yet managed to opened that port.
>>
>> The result is that my device sends an ICMP for the first two received
>> RTP packets.
>>
>> Is this behavior normal or should I not wait for the ACK but open the
>> RTP listen port as soon as I send the 200 OK?
>
>
> Just one comment more:
> Note that the UAC has no way to know when exactly the ACK arrives to the UAS,
> so it makes no sense that the UAC should wait "some" time.
>
>
>
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