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From: asuvax!proto17!williamsk@ncar.ucar.edu (Kevin W. Williams)
Newsgroups: comp.dcom.telecom
Subject: Re: Switching Office Open House
Message-ID: <15608@accuvax.nwu.edu>
Date: 22 Dec 90 00:52:40 GMT
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X-Telecom-Digest: Volume 10, Issue 898, Message 7 of 11


In article <15390@accuvax.nwu.edu>, shri@ncst.ernet.in (H.Shrikumar)
writes:

>   Does some one have figures in re the economics of the SLC-96 ? I don't
> remember having seen any hard numbers in TELECOM Digest.

>   I mean, how much does a SLC-96 cost (equipment + installation +
> maintenance) to the telco? And more to the point, how does this cost
> compare with (equipment+installation+maintenance) cost of 96
> local-loop pairs ?

 You won't see numbers, because there are no numbers. If you are
serving a rural area, a mode 2 SLC-96 running in 2:1 concentration
becomes economical at a fairly close range (2-miles or so).

If you are serving a major metropolitan area, and are weighing the
difference between digging up multiple millions of dollars worth of
real estate to lay in new facility, or reusing a few old analog pairs
to do T1 over, the crossover point can be 50 or 60 feet. I have heard
of SLC-96s being used in the upper floors of buildings just to save on
premises wiring costs.

>   Another question, I recently read about an SLC-120 in an Indian
> telecom magazine. They were referring to the US. Any SLC-120s in
> service ?

I find it difficult to believe that there are SLC-120s in the U.S. The
SLC-120 is based on the European 30+2 scheme (4*30=120, just like
4*24=96).


Kevin Wayne Williams   UUCP : ...!ames!ncar!noao!asuvax!gtephx!williamsk