117 lines
5.4 KiB
Plaintext
117 lines
5.4 KiB
Plaintext
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Well, now that I have you here, I may as well
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bore you with a little history of silver boxes.
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One day, some engineer over at Bell labs got
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the bright idea to sing to his computer...
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and found that the computer responded by dialing
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a phone number. Well, sort of. Anyway, the
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10 digit (old style, with the # and * blocked
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out) touch tone pad was born. Lo and behold,
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though, 2 sets of people decided that 10 (now 12)
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buttons just wasn't enough...they needed
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more. The two people of whom I am speaking are
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of course Ma Bell and Pa AUTOVON (the military
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phone network). So, Ma decided to add an extra
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column to her phones, this one merging the
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standard row tones with a 1633 Hz tone (to
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provide the mystical DTMF). Bell named these
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buttons A,B,C, and D (aren't you glad we have
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such imaginative people at the bell system?),
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while the army named them Flash, Flash override,
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Priority, and priority interrupt (or is it
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Flash interrupt and priority override...)
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anyway...these are used as varying degrees of
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priority during wartime (and wargame) activities
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so generals can call their secretaries very
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quickly. Bell's use of ABC and D is not so clear.
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However, the last button (D) has an interesting
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property...on about 50% of the information
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lines in the country, it will give you a pulsing
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dial tone. You can then enter commands to
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what appears to be a test system for 4A boxes.
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Anyway...the modification...
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Warning...turn on your printer now, and read
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these instructions several times before you
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actually try them. Make SURE you know how
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to solder...this could PERMENANTLY damage your phone!!!
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Step one: Unscrew the two large screws on the base of your phone.
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Take the cover off and place it and the screws
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in a safe place. Now, loosen (but don't remove)
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the screws on the sides of the touch tone key pad.
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(these are on the sides, and attach it to
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its mounting brackets). Now CAREFULLY remove
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the pad from its brackets (don'T rip any wires!)
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You will notice a plastic cover on the pad.
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Separate the two halves, and get them out of your
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way (don't destroy them, they'll be needed...just
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move them down the wire harness that goes through
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them. Now look at the top of the pad (so the 123 row is facing away, and the
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*0# row toward you. Turn over the pad.
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You should see a mass of wires, gold plated
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contacts (yes, it's real gold), discrete
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components, and two large dougnut shaped black
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things. These are coils that generate the frequencies.
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Ma bell was always one for standards, so all
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the coils she manufactures are capable of generating
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all 4 primary tones (she only gives you
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connections to three of them, though). You are about to
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make your own connection to the fourth, and make
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the third column of keys "bank switched" between
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normal and fourth row. Cut three lengths of wire
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of different colors about 2 feet
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long (better overkill than underkill...)
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I used Blue, Gray and Brown, but these
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colors are arbitrary...but I will be referring to
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these colors in the bulletin.
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Look at the coil on the left (with the
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5 solder contacts facing you, rather than being perpendicular to you.
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count over 4 contacts from the left (or 2 from the right)
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and solder a wire to the 4th post from the left. This is the
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1633 Hz output. Solder the other end of this wire to
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the left pole of the smallest SPDT switch you can find
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This is the point of no return now...take a look at the bottom
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edge of the keypad. You should
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see a row of three gold plated contacts (to the right of
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2 very large capacitors). Look at the one on the left. This one controls the r
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ightmost bank of keys
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on the phone. GENTLY separate the
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two touching connectors (they are soldered together with
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a drop of solder) and spread them apart.
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Solder the brown wire to the top contact (the one
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futhest from you), and solder it to the RIGHT pole of the SPDT.
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Now, take the blue wire and solder it to the bottom (closest)
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contact. Solder the other end of
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this wire to the CENTER pole of the SPDT.
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You have now completed your modifications. When the switch is
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in one position, you will get normal tones, in the other you'll get 1633 tones.
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Some finess can be added by passing the three wires through
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the plastic cover, and in through the gap in the
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case of your phone under the place where you hang it up.
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then solder the wires to the switch in the proper places,
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and you can glue the switch to the wall on the
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inside of that small alcove in the phone after taking the slack
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wire back into the phone.
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(this just to make sure you read the whole thing before trying it...)
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Now, call directory assistance using normal tones (out of state, that is)
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XXX-555-1212, Now switch quickly to 1633, and press
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down on the # key (now the D key). If you are
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on an old switchbox (4A), you will get a pulsing
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dial tone. You can then switch back to normal, and try dialing different
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numbers. Two of the most interesting are 6 and 7. These
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often form a loop-around type
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connection, and two people can call in, one using 6
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and the other 7, and talk in this manner. If enough
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people perform this mod, I will keep "office hours" on
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one of these...
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Happy Phreaking...
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Cain
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Note: You will not recieve a pulsing tone until the operator
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actually picks up on the line. If you hear ringing, keep pressing.
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The tone must be on at the same time the operator gives her "beep".
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If you hear her cursing at stupid people with stuck buttons,
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chances are this one doesn't work...try out
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of the way states like Montana, Wyoming,,
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