Hi!

Could someone help me please with this question.

Scenario: A transaction-stateful proxy forwards the INVITE request. The 
proxy does not receive a provisional response, thus starts 
retransmissions. Now, the caller CANCELs the call. How is the proxy 
supposed to handle this? Does the proxy still have to retransmit the 
INVITE or can it stop retransmitting the INVITE?

 From logical point of view I would think that the proxy should stop the 
retransmissions, but from Figure 5 in RFC 3261 it looks like the only 
way to come from "Calling" state to "Terminated" state is waiting for 
Timer B fires (as there is no provisional response yet).

thanks
klaus
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