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From: pacolley@violet.waterloo.edu (Paul Colley)
Newsgroups: comp.dcom.telecom
Subject: Re: Coin Station Fraud Using External Ground
Message-ID: <6121@accuvax.nwu.edu>
Date: 6 Apr 90 18:53:24 GMT
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X-Telecom-Digest: Volume 10, Issue 236, Message 6 of 14


In article <6056@accuvax.nwu.edu> kitty!larry@uunet.uu.net (Larry Lippman) 
writes:

>	In single-slot pre-pay coin stations, the totalizer provided a
>shunt contact across the rotary or DTMF dial which was not removed
>until the full initial rate was deposited.  No money, no dial.  End of
>*this* :-) fraud problem.

I have a friend who can pulse-dial phone numbers by rapidly tapping
the hang-up button.  It's kind of impressive to see him dialling a
number with lots of 9's and 0's in it.  He has about an 80% success
rate (i.e., 20% wrong numbers).

He claims, though I've never seen it, that this works at pay phones
without having to pay.

It requires some co-ordination; I never managed anything better than
the last four digits of my old phone number (1222).

  Paul Colley
  Department of Computer Science, University of Waterloo
  Waterloo, Canada
  pacolley@violet.waterloo.edu or .cdn or .ca