Cool little tip in the latest Wired. Instead of buying a TeleZapper, that little inline phone cable gizmo that tricks telemarketing robo-dialers into thinking they’ve gotten a disconnected number, you can easily make your own. All you have to do is download this WAV file. You can either play this 3-tone sound file into your outgoing answering machine message as is or trim off the last two tones. These are the tones you hear when you get a disconnected number. Only the first tone is required to trick the robo-dialer into thinking that your number is a dead-end (and they’ll take you off their list).