Castle Inc., a partner with the annoying telemarketing callers, boasts that their new software, DirectQuest, is immune to the infamous Telezapper, whose creators claim will put a halt to annoying telemarketing calls.
The Telezapper is a $40 gadget which sent out fake "disconnected number" signals to telemarketers, removing the persons number from their database. The Massachusettes firm has been sending out brochures to telemarketers.
This new software could not only trick the Telezapper, but allows salesmen to transmit any number or text message to the callers Caller-ID. http://www.cnn.com/2003/TECH/ptech/02/26/telemarket.tool.ap/index.html