[Users] Active sessions - dialog

[Michel Bensoussan]

Hello

I need to write a CAC (Call Admission Control) module for an 802.11 AP 
(Access Point).
The idea is to use a SIP Proxy to monitoring bandwith utilization 
according to codec, and allow or disallow new sessions, depending on 
resources.
On a first stage I just want to limit the session to a fix number. For 
that, for each new session request (INVITE), I need to know how many 
active session there is already.
I think using the module dialog but it is experimental.
What is exactly its status? Is it usable for now?
Is there another way to get information about the number of active sessions?

Thanks.

Regards,
Michel