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ADCP-80-314 • Issue 6 • January 2001 • Section 2: Installation
2.2 Environment
2.2.1
Shipping and Storage
The cross-connect system must be shipped and stored in ambient temperatures and humidities
which do not exceed the following:
• Temperature: –55° to +85° C (–67° to +185° F).
• Relative Humidity: 0% to 95% without condensation.
2.2.2
Operational
The DSX-3 (DSX-4H-24) Rear Cross-Connect System must be operated in ambient
temperatures and humidities which do not exceed the following:
• Temperature: –40° to +65° C (–40° to +149° F).
• Relative Humidity: 0% to 95% without condensation.
2.3 Power
The cross-connect system operates on –48 Vdc filtered office battery, fused or breakered at
the office distribution panel. Approximate current requirements can be calculated based on 10
milliamps for each lit LED tracer lamp. The number of tracer lamps lit at any one time will
depend on local patching and testing procedures. The fuse panel, just below the upper wire
trough, at the top of the bay provides a 0.5 Amp. fuse for each DSX-4H chassis in the bay.
2.4 Signal Levels
Each cross-connect system bay serves as an equal level transmission point, and all digital
signals crossing a cross-connect system bay must be maintained within a certain power level
for each specific bit rate. Reference ANSI T1.102-199X Draft American National Standard for
Telecommunications — Digital Hierarchy — Electrical Interfaces.
2.5 Cable Types
All coaxial cables should be 75 ohm coaxial with tinned copper shield (735A/734A or
equivalent).
2.6 Cable Lengths
The digital equipment terminated at the cross-connect system bay must have equalizers and/or
pads which are adjusted for the particular cable lengths to maintain the proper transmission
levels. The maximum length between digital equipment and the bay is governed by the
specific item of equipment and cable type. Refer to
length information.
Page 2-2
2001, ADC Telecommunications, Inc.
Tables 2-1
and
2-2
for detailed cable
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