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From: foxtail!kravitz@ucsd.edu
Newsgroups: comp.dcom.telecom
Subject: Re: Slick-96
Message-ID: <14783@accuvax.nwu.edu>
Date: 18 Nov 90 17:14:46 GMT
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X-Telecom-Digest: Volume 10, Issue 831, Message 2 of 8


In Volume 10, Issue 823, Message 4 of 12, Keven Griffith asks about
Slick 96.

SLC-96 means "Subscriber Loop Carrier-96" and it is a method of
digital multiplexing to accomplish "pair gain". The remote end of
SLC-96 is a box which is mounted in the field.  The box has an AC
operated power supply and gel-cel storage batteries.  For each 24
subscribers, it uses two pairs back to the central office.  Thus 96
subscribers are supported by 8 pairs.  Usually there are two spare CO
pairs brought in for good measure.  The pairs run at T1 rate (1.544
MB/Sec).  It is possible to run with 1/2 the number of CO pairs, but
then you can't give everyone service at once.  If the office is an
analog office, another box like the one in the field converts the
eight pairs back into 96 pairs. If the office end of the setup is a #5
ESS (any size), the digitally multiplexed lines connect directly to
the switching equipment.  Forgive the pun: it is very slick.

There was an entire Bell Labs Technical Journal dedicated to SLC-96 in
December of 1984.  It is Volume 63 Number 10, Part 2.  Any large
engineering library (university) should have it.


Jody