ADC DSX-4U-24, Руководство по установке

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ADCP-80-353 • Issue 2 • August 2002 • Section 1: Description
Page 1-2
©
2002, ADC Telecommunications, Inc.
2 FEATURES AND BENEFITS
2.1 Modularity
The
DSX-3 (DSX-4U-24) Rear Cross-Connect System is modular for easy expansion at the
user’s
site, and may provide any number of bi-directional cross-connects in multiples of 120 (up
to
240 equipment terminations) per 2.13 meter (7 foot) bay. This allows for installation of a
minimal
system configuration to meet the immediate needs of a site, and then expanding it as
necessary
by adding individual DSX-4U circuit modules. Each cross-connect system consists of
up
to 240 DSX-4U circuit modules (two per cross-connect) plugged into a 2.13 m × 48.26 cm ×
30.48
cm (7 foot × 19 inch × 12 inch) equipment bay.
2.2 Connectors
The
DSX-3 (DSX-4U-24) Rear Cross-Connect System has BNC connectors for terminating
coaxial
cross-connect (XO and XI) and equipment IN/OUT (O and I) cabling, and pin jacks for
interconnecting
of tracer lamps. Patching and monitoring is accomplished by means of standard
or
midsize coaxial jacks located on the front of the module.
2.3 Tracer Lamps
A
red flashing light emitting diode (LED) tracer lamp is located at the top of each DSX-4U
circuit
module for quick and easy identification of cross-connected circuits.
2.4 Cable Management
Unequal
flange (duct type) racks and spacers provide space for routing office/equipment cables
to
and from the various shelves in the cross-connect system bay. Cable brackets are provided on
each
side at the rear for fastening of the cables to the bay. Vertical and horizontal rings are
provided
at the rear of the bay for orderly routing of cross-connect cables between circuit
modules
on the bay, and cable troughs at the top and bottom allow for orderly cross-connect
cabling
between bays.
3 FUNCTIONAL DESCRIPTION
The
DSX-3 (DSX-4U-24) Rear Cross-Connect System consists of up to 240 individual DSX-
4U
circuit modules, two of which are shown schematically in
Figure 1-1 .
Each circuit module
accommodates
the input and output of one digital equipment unit, and two circuit modules are
required
for each cross-connect.
Note:
ADC recommends spacing of 25.4 cm (10.0 inches) between bays to avoid the
possibility
of cable congestion.