Cabling Requirements - Huawei DBS3900 Installation Manual

RRU3260
Installation Guide
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.
General Cabling Requirements
Requirements for Bending Radius
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Requirements for Cable Binding
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Security Requirements
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Issue 05 (2014-06-30)
If a cable listed below is not required, skip the routing requirements of the cable.
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.
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.
Cables should be placed away from sharp objects or wall burrs. If these positions are
inevitable, protect the cables with protection pipes.
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9 Installing RU Cables
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