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From: 3215rfs@hogpd.UUCP (R.SOYACK)
Newsgroups: net.games.trivia
Subject: Re: phone-number taxonomy
Message-ID: <352@hogpd.UUCP>
Date: Wed, 4-Jul-84 01:45:36 EDT
Article-I.D.: hogpd.352
Posted: Wed Jul  4 01:45:36 1984
Date-Received: Thu, 5-Jul-84 00:23:24 EDT
References: <248@homxa.UUCP> fortune.3738
Lines: 30



The first the first three (and not two) numbers of a phone number identify
the exchange and the last four numbers indicate the terminating line number.

I am sure of this since I worked, for two and a half years, as a switchman
with the N. Y. Telephone Company.

The numbers were used as follows (the equipment refered to is No. 1 Crossbar
but the theory is general):

	The entire dialed number is stored in the originating sender
	as the user dials.

	The sender passes the first three numbers (for simplicity I
	am assumming that a seven digit number was dialed) to the
	originating marker, and the originating marker determines
	the proper route for the call (from three possible routes).

	When a route is established between the originating and
	terminating offices the originating sender sends the terminating
	line number (the last four digits) to the terminating sender.

	The terminating sender uses the last four numbers to establish
	the final part of the connection to the terminating line number.

The way you say the number doesn't matter cause the machine ain't gonna
hear it anyway.

					Rich Soyack