From: Lizard Blizzard
Subject: Re: and what is SLIC?
Date: Fri, 17 Jan 2003 17:39:15 -0800
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Lizard Blizzard wrote:
> Bob wrote:
>> SLIC = Super Loop Integrated Carrier, which is an older type of
>> system used by Telco's. It is made up of 10 copper pairs and delivers 96
>> POTS lines. Modern type pair-gain systems are often fiber fed and
>> 1000's of POTS lines, but are often called SLICs incorrectly..I like
>> the term pair-gain systems. End-Users often hear about SLICs because
>> do not work with ADSL, unless Remote Terminals with independent feeds are
>> placed with them. (They can work with some SDSL solutions)
> All I know is that at two pairs per T1 line, and 24 POTS lines per T1,
> it should take six pairs of lines to handle all 96 POTS lines. What the
> other four pairs are for is beyond me.
OOPs, I goofed (mental arithmetic slip). Six pairs would only give 72
lines (24 * 3). It takes 8 pairs to give 96 POTS lines.
> What I see out in the field is a rack of stuff somewhat like the
> Lightspan 2000 pair gain beast that we have in our comm room, recently
> expanded to two racks. Each CBA, channel bank ass'y has 224 lines, with
> five CBAs for a total 1120 lines. That's all on a single pair of
> fibers, with a backup pair just in case. It has auto cutover if the
> fiber has a problem.
> If the SLIC is like this, then perhaps the extra pairs are for failsafe
>> "Paul Herber" wrote in message
>>> Subscriber Line Interface Circuit
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