One more note, you can also route the calls within the voicemail system using a menu that takes its input from caller ID number. We had someone harassing us, and it was easy enough for us to block their phone number using DM 3.2.5 CLI Ringing. But of course the troll just started calling us by blocking their caller ID and coming in as an anonymous caller. This person was calling us after hours and leaving harassing voicemail messages. I wanted to block them from leaving voicemail messages but I did not want to block all incoming calls without Caller ID at the carrier level. So I created a custom menu in the SVMI that processes all calls before they go to a mailbox. If there is no caller ID on the call, it is routed to the intercept message telling them that they need unblock their caller ID and call back. If caller ID is present, then the call is passed through to the FWD STATION or FWD TRUNK menu and processed as it normally would be to take a message. It works great.