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Here's how it works: Given that more than 90 percent of telemarketing calls are placed with computer assistance, when either you or your answering machine answers the phone, the Telezapper emits a special tone that tells the computer your number has been permanently disconnected. Telemarketing companies that use automated dialing systems typically remove disconnected numbers from their calling lists, and as your phone number is eliminated from more and more telemarketing lists, you'll notice fewer calls. Of course, not all telemarketers use predictive dialing systems, and those that do will undoubtedly continue their work to evade the Telezapper, but it can be a partial solution.
Most predictive dialing systems will be fooled by the Telezapper's standard single tone. However, for newer dialing systems (presumably designed in response to the success of the previous Telezapper model), the TZ 900 offers an advance three-tone mode. To change the mode, unscrew and remove the protective case and then slide a recessed switch. (We suggest that Privacy Technologies put the switch on the outside for their next model.)
For the most part, regular callers are unaffected by the Telezapper, but it may "zap" calls from other organizations that use the same predictive dialing technology (such as charities, pollsters, and automated emergency weather systems) and from callers who use certain types of calling cards. (For more information, click FAQ, or frequently asked questions, in the left navigation bar.)
Installation takes seconds. Just plug the Telezapper into your phone line and your phone into the Telezapper. It's that simple. A built-in lithium-ion battery provides power and will likely last for the lifetime of the unit. The Telezapper includes a phone cord and instructions. Privacy Technologies backs the device with a one-year warranty. --Mike Brown
It is doing everything it said it would do. Stopped all unwanted calls.Published 2 days ago by Anna Sparacino
Operates ok.No detail paperwork was included on intalling or what to expect on its operation.
I emailed vendor they responded by saying only that they had operated the device... Read more
Had one years ago, lost it in moving. Works great just like the old one.Published 10 days ago by CAH53
This product is obsolete. It only works on rotary dial phones.Published 27 days ago by Richard Jamison
Consumer ADVOCATE advisory- inventory on this product was manufactured around 2002 or 13 yrs. ago. No matter who you purchase it from, you will receive nos merchandise. Read morePublished 1 month ago by CONSUMER Advocate
This item arrived in a well-worn package that looked like it had been opened and re-sealed many times since the seventies... Read morePublished 2 months ago by Dan