bmk@mvuxi.att.com (Bernard Mckeever) (12/12/89)
Slick 96 is really Subscriber Loop Carrier - 96 or SLC-96 {R}. This
type system may also be referred to as a Digital Pair Gain System
because is requires fewer outside plant pairs to serve a larger number
of customers. You are quite correct to assume that it is a MUX, but
it is a form of T1 MUX [1.544 Mbs] based on D4 channel banks. SLC-96
may be configured in several ways for POTS, Special Service, or a
mixture of both. Mode 2 allows up to 96 subscribers on 48 time slots.
A typical SLC system will have at least 1 protection T1 span and a few
metallic pairs for test access and other maintenance applications. SLC
systems will work with coin stations. The remote terminal may be
mounted in cabinet, pedestal, vault, or customer location. Each remote
terminal works with a central office terminal, or connects to a
digital switch via a interface module. SLC does not use the two most
popular framing patterns SF and ESF and can not be directly connected
to a channel bank without framing conversion.
Does it do tricks? Yes! It allows 1FR service in areas where the
TELCO does not have enough outside plant to support it. For people
having that nasty problem of a bunch of [[[[ messing up your modem
connection, [you know who you are] the problem may be between a SLC
system and your brand new Digital CO.
SLC-96 is not the first or the last of the pair gain systems, SLC-1
was an added main line service that provided 2 lines over one pair.
SLC-40 [an analog system] provided additional capacity and the newer
systems are smaller and employ many additional features. No tricks.
You can order 56 Kbs private line service over SLC and expect the same
results as you would over CO based services. If your CO supports ISDN,
SLC has a channel unit available to provide this service. In short SLC
systems extend the range of the central office and outside plant
without costing as much [by far] as a new CO.
Bernie McKeever