Com
pone
nt
No.
Applic
able
Scope
Check Item
4
General
Signal cables are orderly routed and not crossed, twisted, or
winded (cables can be crossed at 1 m out of the cabinet). The
bend radius of cables meets requirements, and the cables are
not excessively bent.
5
General
Signal cables are not damaged or broken and have no splices.
Sufficient cable length is reserved. The reserved cables are
twined and placed properly to facilitate subsequent
maintenance.
6
Indoor
AP
The optical, power, network, and feeder cables are bundled
using straps (one strap every 0.5 m) and securely fastened.
7
Outdoor
AP
The signal cables shall be bundled at even intervals (about
1000 mm), not too tight or too loose. The cables shall be
bundled properly with cable ties placed in neat order. Cut off
redundant cable ties and remove burrs from them to avoid
injuries. The cables shall be fixed using fasteners or ageing-
resistant outdoor metal binding straps.
8
General
Keep the signal cables away from heat sources and use heat
insulation materials to insulate the cables from the heat
sources. Do not place signal cables on the air vents of the
cabinet to avoid affecting subrack heat dissipation or cable
lifetime.
9
General
Pigtail layout should meet the following requirements:
l
Pigtails are not strained or twisted at the bent parts. They
are bundled by binding tape with appropriate force.
l
Pigtails can be pulled back and forth easily inside the
cable tie and are not bent at a right angle.
l
Pigtails are not squeezed by other cables or objects.
l
The flange must be fixed.
l
Pigtails are protected with protective tubes or enveloped
in troughs when they are routed outside the cabinet. The
protective tubes are bundled and processed to prevent
cutting.
l
The optical fiber cannot be folded or twisted, and the
pigtail cannot be squeezed. The binding diameter of an
optical fiber must be larger than 6 cm.
l
The pigtail connection points must be clean and dustless.
Fiber connectors and optical ports that are not used must
be protected with protective caps or plugs. Cleaning must
be carried out in strict accordance with Huawei tool
specifications.
10
General
The feeder cables shall not be bent or twisted, with no copper
wire exposed.
R250D-E
Hardware Installation and Maintenance Guide
5 Appendix
Issue 01 (2016-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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