33 lines
2.1 KiB
Plaintext
33 lines
2.1 KiB
Plaintext
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PRIVATE PAYPHONES #3
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Hello, once again here I am to talk about Phreaking Private Payphones.
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Lesson Three: Other Phrauding Methods. One of the notable things about
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private payphones is that they have to detect signals from the phone line
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(like busy, ringing, etc.) to determine the path your bucks will take
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when you hang up, into the cashbox (burp), or the coin return (ching!).
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One of the signals in particular the phone is looking for is the 3 musical
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tones you get for an intercept recording. (You know, BEEP-BEEP-BEEP, the
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number you have reached is screwed... etc.) Record these tones with a pocket
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tape recorder, or what have you and play them 1-2 seconds after the phone
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connects you to whoever. One of two things will happen: The phone will sub-
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tract mouthpiece signal from line signal, and know that the tones didn't come
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from the Line, and ignore them, or, The phone will recognize them and then
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one of two other things may happen. 1. The call will go thru for free. (yay!)
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2. The Call will go thru for free but the mouthpiece will be turned off.
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(boo) - Still, okay for answering machines or for dial-a-whatever services
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where you only have to listen. The next method is a little more involved,
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and requires some hardware. If you have a "Butt Set" (Lineman's Fone) or
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a piece of shit 9.95 Cobra phone fitted with alligator clips, you can usually
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see on private payphone installations a conduit running from the phone to
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somewhere else. In this conduit runs 2 things: the 2 wires for the phone
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line and 2 to 4 wires for power to the phone (usually low voltage, but be
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careful, some phones use 110!!!) Use a Voltmeter to find the pair that has
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the 48-52 volts D.C. across them and clamp on the Butt Set. - Voila! Dial
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tone! Look for breaks in the conduit to get into, or at the ends. When
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you are on the line in this fashion, there is nothing you can't do.... The
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line is very much like a business or residential phone line and you can
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call anywhere. In the next installment, we'll go into Dirty Tricks and
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simple mechanical Phraud.
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