RRU3832&RRU3632
Installation Guide
9 Installing RU Cables
Issue 05 (2014-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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9.11 Installing a CPRI Fiber Optic Cable
This section describes the procedure for installing a CPRI fiber optic cable.
9.12 Closing the Cover Plate of an RU Cabling Cavity
This section describes the procedure for closing the cover plate of an RU cabling cavity.
9.1 Cabling Requirements
Cables must be routed according to the specified cabling requirements to prevent signal
interference.
If a cable listed below is not required, skip the routing requirements of the cable.
General Cabling Requirements
Requirements for Bending Radius
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.).
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.).
The bending radius of the power cable or PGND cable must be at least three times the
diameter of the cable.
The bending radius of a fiber optic cable is at least 20 times the diameter of the fiber
optic cable, and the minimum bending radius of the breakout cable at each end of the
fiber optic cable is 30 mm (1.18 in.).
The bending radius of the E1/T1 cable must be at least three times the diameter of the
cable.
The bending radius of the signal cable must be at least five times the diameter of the
cable.
Requirements for Cable Binding
The same types of cable must be bound together.
Different types of cable must be separately routed with the minimum spacing of 30 mm
(1.18 in.) and cannot be entangled.
The cables must be bound tightly and neatly. The sheaths of the cables must not be
damaged.
Cable ties are installed in the same direction, and those at the same horizontal line must
be in a straight line.
The excess of indoor cable ties is trimmed off, and the excess of outdoor cable ties
allows about 5 mm (0.2 in.), without remaining rough edges.
Labels or nameplates must be attached to both ends, joints, or turns of cables after they
are installed.
Security Requirements
Cables should be placed away from sharp objects or wall burrs. If these positions are
inevitable, protect the cables with protection pipes.
