Huawei DBS3900 Installation Manual page 324

DBS3900 (Ver.B)
Installation Guide
Procedure
Step 1 Install an E1/T1 surge protection transfer cable, as shown in
1.
2.
Step 2 Route the cable by referring to
cable.
Step 3 Label the installed cables. For details, see Attaching an L-Shaped Label.
----End
Installing an E1/T1 cable
When a DBS3900 is deployed outdoors with DC power supply, the BBU can be installed in an
OMB. In this case, an E1/T1 cable connects the surge protection unit and external transmission
equipment for E1/T1 signal transmission.
Issue 06 (2011-09-15)
Link the DB26 connector at one end of the E1/T1 surge protection transfer cable to the E1/
T1 port on the GTMU, WMPT, or UTRP in the BBU, and then tighten the plastic screws
on the connector until the tightening torque reaches 0.25 N·m.
Link the DB25 connector at the other end to the INSIDE port on the UELP in the BBU,
and then tighten the plastic screws on the connector until the tightening torque reaches 0.25
N·m.
Figure 9-24 Installing an E1/T1 surge protection transfer cable
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9 Outdoor Scenario with DC Power Supply (BBU Installed
9.4.1 Cabling Requirements, and then use cable ties to bind the
in an OMB)
Figure 9-24.
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