3
Table 3 Humidity requirements
Item Humidity
Operating humidity (noncondensing)
10% RH to 95% RH
Storage humidity (noncondensing)
5% RH to 95% RH
Altitude
Table 4 Altitude requirements
Item Altitude
Operating altitude
–60 m (–196.85 ft) to +4 km (2.49 miles)
Storage altitude
–60 m (–196.85 ft) to +4.5 km(2.8 miles)
Cleanliness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of
metal components and contact points, especially when indoor relative humidity is low. In the worst
case, electrostatic adsorption can cause communication failure.
Table 5 Dust concentration limit in the equipment room
Substance
Concentration limit (particles/m
3
)
Dust particles
≤
3 x 10
4
(No visible dust on desk in three days)
NOTE:
Dust particle diameter
≥
5 µm
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion
and premature aging of components, as shown in
.
Table 6 Harmful gas limits in the equipment room
Gas Max.
(mg/m
3
)
SO
2
0.2
H
2
S 0.006
NH
3
0.05
Cl
2
0.01
NO
2
0.04
Cooling system
The router has a horizontally-oriented fan tray slot at the top and uses bottom to top airflow for heat
dissipation.
To ensure good ventilation, the following requirements must be met:
•
Leave a minimum clearance of 10 cm (3.94 in) at the inlet and outlet air vents.
•
The installation site has a good cooling system.
