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Text File
|
1990-09-07
|
6KB
|
140 lines
<=-=*=---------------------------=*=-=>
| White Box Plans |
| (Uploaded by Agrajag the Prolonged) |
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<=-=*=---------------------------=*=-=>
| Overview |
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| |
| 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. |
| |
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| Instructions |
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| |
| 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 miniqture 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 Shqck # 273-1380) |
| A standard 8-ohm speaker |
| Two 9-volt radio batteries |
| Two 9-volt bqttery clips |
| A case to put it all in (optional) |
| |
| A few construction notes, I |
| suggest that you solder and tape all|
| 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 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 tha remaining |
| black lead from first battery clip. |
| You have now finished the power |
| connection t 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 connested to anything, along |
| with quite a few wires from the |
| keypqd. The 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 |
| # 941 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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