[Sip] 302 question

Hi all,

I'm writing an UAS.

The UAS has a feature, that if the called number is matching with a 
pattern, it will send 183 Session in progress, than plays an RTP stream 
and then redirect the UAC with 302 Moved Temporarily..

There is an UAC, and it's developers says that I should not send 302 
Redirect after the 183 Session in progress.

This solution works well with CISCO media gateways.

I could not find the exact paraghaph about it in the RFC 3261.

Can sy help me in this ?

So, the call flow is the following:

UAC                      UAS
     --- INVITE --->
     <--- 100 ------
     <--- 183 ------
     <-- RTP --
          .
          .
          .
     <--- 302 ----

Is this correct ?

Thanks,
Misi

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