30 lines
1.7 KiB
Plaintext
30 lines
1.7 KiB
Plaintext
PRIVATE PAYPHONES #1
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Hello, All. I am one of the designers of one of the private payphones
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that you are probably seeing all around in place of the Iron Horse, or
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"Fortress" phones (Bell's). This is probably the first part of who
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knows how many on how to Phreak private payphones. Lesson 1: Introduction.
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The private payphone differs from the fortress phone in
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that the dialtone you hear when you first pick up the handset is not
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network dial tone, but a "Fake" dial tone for your convenience.
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This of course is shut off when your first digit is dialed, and DTMF
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or "Touch Tones" are played at each key press, also for your convenience. The
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digits are pissed out to perhaps an LCD display but
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more importantly, NOT the network. They are merely buffered into the
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micro that's in charge, so the dial string may then be rated. This is
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one way the payphone insures against fraud and is called pre-pay oper-
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ation, where you hafta insert bucks to get it to actually outdial the call.
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Note well: Free calls, 950's, 1-800's, 0 and 0+ (credit card,
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collect, etc.) are placed immediately, with no beg cycle for bucks.
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This is the 1st step toward phreaking a private payphone, getting out
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into the real network for free, and untimed by the phone. Side Note:
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When you walk away from a Bell phone that rings you back for overtime
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deposit, the CALLED PARTY is billed for that amount. The private
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payphone has no way to do this, so it must disconnect you if your
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overtime is not paid. Getting out on an untimed call means the phone
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will not beg for overtime and eventually disconnect you. In the next
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installment, we'll go into what to do when you hit the open network
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and how some of the phones out there guard against fraud.
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