I have Norstar with 6.1 Software and a Call Pilot 150 Voice Mail. I was told by my LD carrier that someone was making Intl calls from my switch. I have blocked Int'l on the lines and disabled the switch from dialing 1010XXX type calls. Is this the only thing I can do to stop them from attempting to get into and out of my switch? I do have several people who have VM notification on mailboxes and several that forward calls out of the system to Cell numbers.