Hi,
 
I have a question on SUBSCRIBE/NOTIFY for presence. The scenario is :
 
There is a user A who subscribes for some other user B by sending a SUBSCRIBE to presence server and then he gets a 200 OK and NOTIFY telling the subscription is active and then user A sends 200 OK for the NOTIFY he gets. Now when ever state of B changes he gets a NOTIFY from the server indicating the change in the state of B.
 
Now if user A has to notify the change of its state to server, the presence server should subcribe to user A to the state change notifications. The question is that can the server send SUBSCRIBE request on the same dialog as that established by a SUBSCRIBE from user A to presence server. More specifically, can there be two subscriptions going in opposite directions exist in a single dialog.
 
Any suggestions will be appreciated.
 
Rgds
 Krishna
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