________________________________________
From: [email protected] 
[[email protected]] On Behalf Of Iñaki Baz 
Castillo [[email protected]]

This is, basically the CANCEL processing in the proxy changes nothing
in the proxy itself. Do I miss something? (however I've re-checked it
and found nothing else).
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That is correct.  The tree of proxies is responsible for propagating CANCEL to 
all the UASs that have received INVITEs.  But the real race between the user 
answering the call at a UAS and the CANCEL terminating the early dialog is 
fought in the UAS.  That's why the UAS always responds 200 to CANCEL and it is 
the response code to the INVITE that tells whether the call was canceled or 
answered.

Dale

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