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From: friedl@mtndew.tustin.ca.us (Stephen Friedl)
Newsgroups: comp.dcom.telecom
Subject: Re: IEEE Spectrum Article on 'Blue Boxes'
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Date: 2 Nov 90 14:41:51 GMT
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X-Telecom-Digest: Volume 10, Issue 786, Message 1 of 10


Eddy Gurney writes:

> "Until the phone company separated signaling
> information from the voice signal, long-distance calls could be made
> without charge by anyone who could whistle at 2600 hertz."

A couple of questions about this.  First, was the moving signalling
info out of the voice channel done solely to prevent fraud?  Second,
how big a job was this to redesign the phone system for it (my guess
is that it was a Very Big Deal) ?


Stephen J. Friedl, KA8CMY / I speak for me only / Tustin, CA / 3B2-kind-of-guy
+1 714 544 6561  / friedl@mtndew.Tustin.CA.US  / {uunet,attmail}!mtndew!friedl