ADC has designed a family of Fiber Loop Converters (FLCs) that provides a cost-effective
alternative to deploying service over copper while avoiding the high capital investment of
DS3 fiber optic terminals. This family includes products designed for economical distri-
bution of single or multiple DS1s.
The Quad FLC multiplexes up to four T1s for transport over two fibers at distances of 16
to 20 miles (26 to
33 km). The QFLC system consists of a rack mounted central office chassis and a wall
mounted customer premises chassis.
The concept of delivering T1s is
almost 30 years old. New technolo-
gies like HDSL have been intro-
duced but, overall, T1-based ser-
vices today are being delivered
with the same architecture used in
the 1960s. But, while the architec-
ture has remained, applications
have changed radically. The tele-
phone company introduced T1 as a
means of delivering message
trunks over copper facilities
between central offices.
This application note addresses the various powering options for the Quad Fiber Loop
Converter (QFLC) and DS3 Fiber Loop Converter (DS3 FLC).
The ADC Quad Fiber Loop Converter (QFLC) and DS3 Fiber Loop Converter (DS3 FLC)
modules can be housed in either the eight position chassis or the four position wall
mount chassis. Each module also fits into a specially designed two position horizontal
chassis. All these chassis use a different powering arrangement.