Just gonna put my 2 cents in. I work for a major home security company. Our monitoring department, the ones that call your home and the police if your alarm goes off, use computers to dial your number to call your home and other contacts. Telezaper will delete your number from their database. Soooooo...if you don't have a home security system, by ALL MEANS get Telezapper, I've got one and absolutely love it. But I don't have a home security system. Another thing that messes with a security system is that Privacy Manager most people get to stop telemarketers, basically, if you get a call that's not recognized by the system, you have to either enter a code or record a voice mail message, if your home security company is trying to call, and their number is nto recognized, they can't get through. Just a few things I thought I'd bring up, sorry for the essay..lol.