Securing unauthorised source from making phone calls

alei
Joined: Fri 07 of Aug, 2009

Securing unauthorised source from making phone calls

Posted:Fri 07 of Aug, 2009 (08:41 UTC)
Hi,

I have 5 SIP phones with fixed CCID. How do I keep ONLY these phones (known phone extensions) from being the ones making phone calls? Right now, I can see a number of unknown numbers as well as numbers which do not belong in our extension list making phone calls from our server.

Thanks for your time.