Figure 14-37 Installing the SLPU
----End
14.5 Installing Cables
This section describes the procedures and precautions to be taken for installing power cables
and monitoring signal cables when a DBS3900 is deployed indoors with DC power supply, the
BBU is installed indoors, and the RRUs obtain outdoor power supply.
14.5.1 Cabling Requirements
Cables must be routed according to the specified cabling requirements to prevent signal
interference.
NOTE
If a cable listed below is not required, skip the routing requirements of the cable.
General Cabling Requirements
The bending radius of the cables must meet the following specifications:
l The bending radius of the 7/8'' feeder must be more than 250 mm (9.84 in.), and the bending
radius of the 5/4'' feeder must be more than 380 mm (14.96 in.).
l The bending radius of the 1/4'' jumper must be more than 35 mm (1.38 in.). The bending
radius of the super-flexible 1/2'' jumper must be more than 50 mm (1.97 in.), and the bending
radius of the ordinary 1/2'' jumper must be more than 127 mm (5 in.).
l The bending radius of the power cable or PGND cable must be at least five times the
diameter of the cable.
l The bending radius of an fiber optic cable is at least 20 times the diameter of the fiber optic
cable.
l The bending radius of the E1/T1 cable must be at least five times the diameter of the cable.
l The bending radius of the signal cable must be at least five times the diameter of the cable.
The cables must be bound as follows:
l Different types of cables must be separately routed and cannot be entangled.
l The cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.
l The cable ties must face the same direction, and those at the same horizontal line must be
in a straight line. Extra length of cable ties must be cut.
DBS3900 (Ver.B)
Installation Guide
14 Indoor Scenario with DC Power Supply (BBU Installed
Indoors and RRU Powered Outdoors)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
526
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