Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!ames!killer!vector!nobody
From: ron@ron.rutgers.edu (Ron Natalie)
Newsgroups: comp.dcom.telecom
Subject: Re: 1+areacode
Message-ID: <telecom-v09i0039m02@vector.UUCP>
Date: 30 Jan 89 21:33:06 GMT
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X-TELECOM-Digest: volume 9, issue 39, message 2

> It's obvious we're running out of area codes, simply because new services
> open up more phone numbers.  In the beginning, for example, there was
> Centrex.  So, instead of a medium office building having 20 phone lines
> (and phone numbers), with an operator switching calls in the building,
> the building may still have only 20 phone lines to the outside, but
> could be using 200 phone numbers for each of the inside phones.

What you're describing is NOT Centrex.  Centrex runs a line from the
CO to each phone.  You are describing the traditional PBX with DID.


-Ron