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From: ms6b+@andrew.cmu.edu (Marvin Sirbu)
Newsgroups: comp.dcom.telecom
Subject: Re: Unequal Service
Message-ID: <telecom-v09i0476m05@vector.dallas.tx.us>
Date: 27 Oct 89 18:17:37 GMT
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X-TELECOM-Digest: volume 9, issue 476, message 5 of 10

Besides large corporate customers, other factors which affect the
decision to replace a switch include the rate of growth and the growth
in the use of data.  The marginal cost of adding capacity to a
crossbar is very high; if growth in lines or call holding times is
fast enough, it is cheaper to put in a new switch than continue to
upgrade an old one.  In addition to being the home of a large computer
company, Cupertino has experienced rapid growth as well.

Marvin Sirbu
CMU