ADC DSX-4U-24, Installation Manual

Page: 19 / 34

ADCP-80-353 • Issue 2 • August 2002 • Section 2: Installation
Page 2-2
©
2002, ADC Telecommunications, Inc.
2.2.2 Operational
The
DSX-3 (DSX-4U-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-4U chassis in the bay.
2.4 Cable Types and Lengths
All
coaxial cables should be 75 ohm coaxial with tinned copper shield (735A/734A or
equivalent).
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. See
Figure 2-1
and
Table 2-1
for detailed cable length
information.
Figure 2-1. Coaxial Cable Lengths and Losses
NETWORK
ELEMENT
(NE)
NETWORK
ELEMENT
(NE)
DSX
DSX
0.50 dB
0.50 dB
0.50 dB
0.50 dB
0.50 dB
6.0 dB TOTAL
12.0 dB TOTAL
CROSS-CONNECT JUMPERS
EQUIPMENT CABLES
9213-B
34.368, 51.84, 139.264 Mbps
155.52 Mbps
2.048, 8.448 Mbps
12.7 dB TOTAL
2.048, 8.448 Mbps
34.368, 51.84, 139.264 Mbps
155.52 Mbps
0.75 dB
0.75 dB
0.75 dB
0.75 dB
2.25 dB 2.25 dB
5.0 dB
5.35 dB
5.0 dB
5.35 dB