Procedure
Step 1 Install an E1/T1 surge protection transfer cable, as shown in Figure 9-24.
1. 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.
2. 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
Step 2 Route the cable by referring to 9.4.1 Cabling Requirements, and then use cable ties to bind the
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.
DBS3900 (Ver.B)
Installation Guide
9 Outdoor Scenario with DC Power Supply (BBU Installed
in an OMB)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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