3 Preparing for Installation
Environment Requirements
The router is designed for indoor application. To ensure the normal operation and prolong the
service life, the installation site must meet the requirements mentioned hereunder.
Temperature and Humidity Requirements
The temperature and humidity in the equipment room shall be maintained at an appropriate
level.
A long-term high relative humidity will quite likely result in poor insulation performance, electric
leakage, mechanical property change, and corrosion.
A long-term low relative humidity will result in looseness of fastening screws owing to shrinkage
of insulation washers, or electrostatic discharge (ESD), which may damage the CMOS circuit on
the router.
A high temperature will speed up the aging of insulation materials, which greatly lowers the
router’s reliability and shortens the service life.
Table 3-1 lists the requirements on temperature and humidity for the router.
Table 3-1 Temperature and humidity requirements in the equipment room
Temperature Relative humidity
0°C to 45°C (32°F to 113°F) 10% to 95% (noncondensing)
Cleanness Requirements
Concentration limit of dust
Dust is harmful to the safe operation of the router. Dust on the chassis may result in static
adsorption, which causes poor contact between metal connectors or joints. The poor contact
may not only shorten the service life of the router, but also bring about communication
failures. Especially under the condition of low indoor humidity, dust is more likely to occur,
causing static adsorption.
Table 3-2 lists the requirements on the dust concentration and diameters in the equipment
room.
Table 3-2 Limitation on dust concentration and diameter in the equipment room
Diameter (μm) 0.5 1 3 5
Concentration limit
(particles/m
3
)
1.4 x 10
7
7 x 10
5
2.4 x 10
5
1.3 x 10
5
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