I saw a commercial for the Telezapper last night, and checked out their website today (http://www.telezapper.com). It’s a small device that you attach to your phone line. The claim is that it will automatically stop telemarketers by sending a signal to the telemarketers’ auto-dialer telling it that your line is out of service.
So is this for real? Does it work? What is this magic tone that tells an auto-dialer that the phone is disconnected, even though it was just answered (the telezapper sends its magic signal when you (or your answering machine) answer the phone)?