89 lines
3.5 KiB
Plaintext
89 lines
3.5 KiB
Plaintext
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White Box Plans
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(Uploaded by The Mystic)
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This article will tell you how to change a normal touch tone
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keypad and convert it to a portable unit. In addition, we
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give the touch-tone frequencies.
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First of all, the tones made by a touch tone telephone are not
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single tones, they are a combination of two tones, making "DTMF"
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(dual tone multi-frequency). The normal tone telephone dials 12
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different signals, but is capable of dialing 16 different signals
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(see bulletin on silver boxes).
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The power required by a keypad is about 25 volts, but they will
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work with as little as 15, thereby allowing the use of two 9-
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volt radio batteries. As you may have guessed, they are also
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designed to operate with a telephone type speaker (and phone
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line), and not the standard 8-ohm speaker which needs to be used
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for adequate volume. To accompolish this, we use a matching
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transformer, this is one of those miniature ones available at
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Radio Shack. Enough of the theory, now for the circuit.
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You will need:
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A touch tone keypad
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A miniature 1000 to 8 ohm transformer (Radio Shack # 273-1380)
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A standard 8-ohm speaker
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Two 9-volt radio batteries
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Two 9-volt battery clips
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A case to put it all in (optional)
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A few construction notes, I suggest that you solder and tape all
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connections. It is also important to read this entire bulletin
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before attempting to construct this.
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First, connect the RED wire of the transformer to either
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terminal on the speaker. Now connect the WHITE wire from the
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transformer to the other terminal on the speaker. Next, connect
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the RED (positive) wire of one battery clip to the black wire of
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the other battery clip. Now connect the the remaining RED wire
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on the second battery clip to the GREEN wire from the touch tone
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pad. Connect the BLUE wire from the touch tone pad to the
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ORANGE-and-BLACK striped wire from the touch tone pad. To these
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two wires, now connect the remaining black lead from first
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battery clip. You have now finished the power connection to the
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keypad. Connect the BLACK wire from the keypad to the BLUE wire
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on the transformer. Next connect the RED-and-GREEN striped wire
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from the keypad to the GREEN wire on the transformer. The BLACK
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wire on the transformer should not be connected to anything,
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along with quite a few wires from the keypad. The connection of
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the keypad is now complete. All you have to do is connect two
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nine volt batteries to the battery clips, and you'll be ready to
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go. You may want to mount it in a case for easy portability.
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Note that the silver box modification CAN be made to this unit,
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allowing complete remote phreaking. When none of the buttons
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are pressed, this unit uses NO power, thereby eliminating the
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need for a power switch, and extending the life of the
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batteries.
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The following are the frequency combinations generated by each
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button on the keypad.
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KEY FREQ. #1 FREQ. #2
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--- -------- --------
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1 697 1209
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2 697 1336
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3 697 1477
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A 697 1633
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4 770 1209
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5 770 1336
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6 770 1477
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B 770 1633
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7 852 1209
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8 852 1336
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9 852 1477
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C 852 1633
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* 941 1209
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0 941 1336
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# 941 1477
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D 941 1633
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All frequencies are measured in Hertz
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Note that A,B,C and D are not normally present (except for silver boxes)
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Downloaded From P-80 Systems 304-744-2253
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