TeleZapper

The TeleZapper is a device designed to reduce the number of telemarketing-related phone calls a household receives by imitating the tone signal normally played by a phone company to indicate a line has been disconnected. The Telezapper was created by Privacy Technologies.[1]

  1. ^ Mossberg, Walter (8 May 2002). "TeleZapper Successfully Reduces Annoying Marketing Phone Calls". Wall Street Journal. Retrieved 29 October 2024.