         WHITE BOX PLANS
         ----- --- -----
           
 
   This article will tell you how to change a normal touch tone keypad and 
convert it to a portable unit. in addition, we give the touch-tone 
frequencies.
 
   First of all, the tones made by a touch tone telephone are not single 
tones, they are a combination of two tones, making "dtmf" (dual tone multi-
frequency). the normal tone telephone dials 12 different signals, but is 
capable of dialing 16 different signals (see bulletin on silver boxes).
 
   The power required by a keypad is about 25 volts, but they will work 
with as little as 15, thereby allowing the use of two 9-volt radio batteries.
As you may have guessed, they are also designed to operate with a telephone 
type speaker (and phone line), and not the standard 8-ohm speaker which needs
to be used for adequate volume.  To accompolish this, we use a matching
transformer, this is one of those miniature ones available at radio shack. 
Enough of the theory, now for the circuit.
 
You will need:
 
A touch tone keypad
A miniature 1000 to 8 ohm transformer (radio shack # 273-1380)
A standard 8-ohm speaker
Two 9-volt radio batteries
Two 9-volt battery clips
A case to put it all in (optional)
 
   A few construction notes, I suggest that you solder and tape connections.
It is also important to read this entire bulletin before attempting to 
construct this.
 
   First, connect the red wire of the transformer to either terminal on the
speaker. Now connect the white wire from the transformer to the other 
terminal on the speaker.  Next, connect the red (positive) wire of one 
battery clip to the black wire of the other battery clip.  Now connect the 
remaining red wire on the second battery clip to the green wire from the 
touch tone pad.  Connect the blue wire from the touch tone pad to the orange-
and-black striped wire from the touch tone pad. To these two wires, now 
connect the remaining black lead from first battery clip.  You have now 
finished the power connection to the keypad.  Connect the black wire from the
keypad to the blue wire on the transformer.  Next connect the red-and-green 
striped wire from the keypad to the green wire on the transformer.  the black
wire on the transformer should not be connected to anything, along with quite
a few wires from the keypad. Connection of the keypad is now complete. All 
you have to do is connect two nine volt batteries to the battery clips, and 
you'll be ready to go. you may want to mount it in a case for easy 
portability. Note that the silver box modification can be made to this unit,
allowing complete remote phreaking. When none of the buttons are pressed, 
this unit uses no power, thereby eliminating the need for a power switch, and
extending the life of the batteries.
 
The following are the frequency combinations generated by each button on the
keypad.
 
Key     Freq. #1        Freq. #2
---     --------        --------
1       697             1209
2       697             1336
3       697             1477
a       697             1633
 
4       770             1209
5       770             1336
6       770             1477
b       770             1633
 
7       852             1209
8       852             1336
9       852             1477
c       852             1633
 
*       941             1209
0       941             1336
#       9411 1477
d       941             1633
 
All frequencies are measured in hertz.

Note that a,b,c and d are not normally present (except for silver boxes).

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