My brother has a service through the phone company called "Privacy Manager". When a caller comes up as "unidentified" or "anonymous", the call is not put through right away. The caller has to say who they are in order to put the call through. Most telemarketers won't. When his girlfriend calls (she has an "unavailable" number due to her profession) all she has to do is say "It's Marge" and the call goes right through to my brothers phone.

I'm not sure what he pays for the service, and you have to have Caller ID first, but he loves it.

campfire