The Web Page You Have Reached  
 http://www.twpyhr.com   
 TeleZapper Box 

December 6, 2001
  By: Jenn   


The Telezapper is a device one connects to their telephone line to aid in thwarting annoying 
telemaketing calls. In a nutshell, how it works is everytime an extension is taken off-hook, 
it plays the first tone of the special information tones (The tones you hear before error 
recordings.) When this is heard by the telemarketers robodialer, the number is marked as out
of service and taken off the list of numbers to call.

I was working on my web page, adding box plans, when I found plans for a box which used a 
similar principle, The Privacy Box by Compudroid. His box played the tones for *67 every time
a phone is taken off hook so every call made would be marked as private on the callees caller ID.

Here were his plans:

From fake@address.com Sun Jan 10 16:59:15 1999
From: compudroid@aol.com (CompuDroid)
Newsgroups: fido7.phreaks
Subject: privacy box

lately the PLA discussion board has been trying to make a new
box, heres the privacy box which automatically dials *67 for you whenever u pick up the phone,
its not a great phreaking trick or anything but it is useful:

guys the privacy box is really simple to make, heres what u need:

1 digital tape recorder
1 12volt normally closed SPST relay
1 phone

First take the digital tape recorder and record the tones for *67 and make sure they work when u
play them into the phone.  Now radio shack sells one for like 20 bucks or something that has 1 
button and like 16 seconds of talk time, u only need 1 second really, but i think that one is 
pretty good. Ok now take your digital recorder and open it up so you cansee the two contact that
 are attached to the button, when u push the button the 2 contacts make a connection (duh) and 
close the circuit, solder a wire to each contact, making sure u dont soder them together, now 
soder those two wires to the output of your relay. Next take the two imput contacts of your 
relay and wire them to the red and green wires that are in your phone. What happens is when u 
pick up the phone the voltage will drop below 12 volts which will close the relay (thats why u 
need a normally closed) and closing the relay will activiate the button on your tape recorder. 
You should wire the speaker of your tape recorder directly to the black and white wires in your 
phone so that the tones are sent directly over the line. Now whenever you pck up the phone it'll 
be like u push the button and yay *67 = no trace!!!!

-compudroid

Replace the *67 tones with SIT tones and for your own home made Telezapper (SIT).

Jenn
activiate the button on your tape recorder. You should wire
the speaker of your tape recorder directly to the black and white
wires in your phone so that the tones are sent directly over the
line. Now whenever you pck up the phone it'll be like u push the
button and yay *67 = no trace!!!!

-compudroid

Replace the *67 tones with SIT tones and for your own home made
Telezapper.

Jenn