Huawei NetEngine80E Installation Manual page 52

HUAWEI NetEngine80E Router
Installation Guide
Use dedicated tools provided or specified by Huawei and follow the installation procedure
described here.
Bending Radius
Unless otherwise specified, bending radiuses (R) of cables or fibers must meet the requirements
listed in
Table 3-9 Bending radiuses of cables or fibers
Cable or Fiber
Ordinary cable
Feeder
RF cable
Fiber
Precautions for Installation
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Requirements for Cable Routing
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Issue 02 (2011-09-10)
Table 3-9.
NOTE
The letter d indicates the diameter of a cable or fiber.
Hold the terminals of cables instead of pulling the cables when installing or removing the
cable components.
Do not insert a connector forcibly when the connector is blocked. Pull out the connector
by using a dedicated tool. Install the connector again after you check that the pins are
inserted properly.
Before tightening screws on cable connectors, ensure that the connectors are properly
connected with their adapters. Use flathead or Phillips head screwdrivers and do not use
too much force. To avoid damaging screws or adapters, do not tighten the screws forcibly.
When removing densely aligned cables or fiber connectors, use dedicated pliers such as
cable-pulling pliers and fiber-pulling pliers.
Do not twist, bend, stretch, or extrude fibers during installation.
Cover the fiber connectors that are not in use by using dustproof caps. Remove the dustproof
caps before using the fiber connectors.
To protect cables, remove the burrs in the cable through-holes or install protective rings in
the holes.
To ease the connection and to avoid stress, keep slack at cable joints. After connecting
multiple cables to a connector that has multiple interfaces, keep the cables slack to avoid
stress generation.
Bind or clean cables gently because cable distortion affects signal quality.
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Copyright © Huawei Technologies Co., Ltd.
3 On-site Cable Assembly and Installation
Bending Radius (R)
In normal cases, R ≥ 2d. When the cable is
connected with a connector, R ≥ 5d.
R ≥ 7d
In normal cases, R ≥ 15d. At the maximum
limit, R ≥ 10d.
R ≥ 40 mm (1.57 in.); Bending angle > 90°
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