ADCP-80-353 • Issue 2 • August 2002 • Section 1: Description
Page 1-1
©
2002, ADC Telecommunications, Inc.
SECTION 1: DESCRIPTION
1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
2
FEATURES AND BENEFITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
2.1
Modularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
2.2
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
2.3
Tracer Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
2.4
Cable Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
3
FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
4
PHYSICAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
4.1
DSX-4U Circuit Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
4.2
DSX-4U Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
4.3
Fuse Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
4.4
Cable Rings and Troughs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4.5
Cable Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4.6
Cross-Connect System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5
SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
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1
GENERAL
This
section describes ADC’s DSX-3 (DSX-4U-24) Rear Cross-Connect System and its
applications
in large and small offices, digital loop carriers, and customer premises. The system
provides
for test access, patch, cross-connect, and monitor functions in 75 ohm digital
transmission
systems operating with a common signal format and bit rate. Bit rates of digital
systems
in which this cross-connect system may be used are:
• 2.048
megabits per second.
• 8.448
megabits per second.
• 34.368
megabits per second.
• 51.84
megabits per second.
• 139.264
megabits per second.
• 155.52
megabits per second.
The
DSX-3 (DSX-4U-24) Rear Cross-Connect System is typically used between multiplexing/
demultiplexing
or digital switch equipment and a transmission medium such as digital coaxial
cable,
microwave radio, or fiber optics. It is recommended that signals from all digital
equipment
are maintained at an equal level at the cross-connect system by means of office-
provided
pads and equalizers which compensate for the various cable lengths. This allows for
testing,
patching, and rearranging of compatible equipment at the cross-connect system without
having
to readjust signal levels.
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