Huawei NE05E Hardware Manual page 403

HUAWEI NE05E,NE08E
Hardware Guide
Lighting in the Equipment Room
The OptiX transmission equipment room is equipped with three lighting systems.
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Protection System
This section describes the requirements for the protection system.
ESD protection
The equipment-affecting electrostatic induction comes from the external electric
field such as outdoor high voltage transmission line or lightning. It also comes
from the internal system such as indoor environment, floor materials or
equipment structure.
Static electricity may damage the metallic parts on integrated circuit boards and
cause faults in software and electronic switch. Statistics shows that 60 percent of
the damaged circuit boards are caused by static electricity. It is essential to take
effective ESD protection measures.
The following measures are recommended:
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Interference prevention
With the development of technologies and social economy, more and more
electromagnetic signals are transmitted in the air. They may affect the
communication quality by causing cross-talk and stray noise, and even result in
communication interruption. The electromagnetic interference (EMI) sources
include:
Issue 05 (2023-03-31)
Active lighting system, which is powered by mains supply.
Backup lighting system, which is powered by backup power supply (diesel
electric generator) of the office.
Emergency lighting system, which is powered by storage batteries when the
mains supply has been interrupted but the backup power supply has not yet
started to supply power.
Ground the equipment well. When laying the raised floor covered with
semiconductive materials, copper foil should be used for grounding at a
number of points on the floor (the copper foil should be placed between the
concrete floor and the semiconductive floor and should be connected to the
ground cable).
Take dust-proof measure. Dust may do great harm to router equipment. Dusts
or other particles getting into the equipment room may cause poor
connection between connectors or metal connecting points. When the
humidity in the room is high, dust can cause electrical leakage. It is found in
maintenance that the equipment failure is often caused by accumulated
dusts. Especially, when the humidity in the room is very low, electrostatic
adherence is likely to occur.
Keep proper temperature and humidity. Too high humidity may make the
metal components rusty, while too low humidity may induce static electricity.
Always wear an ESD wrist strap and lab coat when touching a circuit board to
prevent electrostatic damage to the equipment.
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4 Hardware Installation and Parts Replacement
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