5 
Preparing for installation 
Safety recommendations 
 
 
ARNING! 
Before installation and operation, read all of the safety instructions in 
Compliance and Safety Guide
 
supplied with your router. 
 
Follow these general safety recommendations: 
•  Turn off all power and remove all power cables before opening the chassis. 
•  Unplug all power and external cables before moving the chassis. 
•  Before installation, locate the emergency power switch so that you can shut off power 
immediately if necessary. 
•  Always wear an ESD-preventive wrist strap when installing the router. 
•  Do not stare into an open optical interface. The light can cause permanent eye damage. 
•  Use a good grounding system. This is essential for reliable operation. 
•  Confirm that the resistance between the chassis and the ground is less than 1 ohm. 
Site requirements 
The router can only be used indoors.  
This section provides information about temperature, humidity, cleanness, and air quality requirements, 
as well as rack-mounting requirements and protection against damage from lightning and EMI.  
Table 1 Temperature and humidity requirements 
Tem
erature Relative humidit
0°C to 40°C (32°F to 104°F)  5% to 90% 
 
Table 2 Dust concentration limit in the equipment room 
Substance  Concentration limit (
articles/m
3
)
Dust particles  ≤ 3 x 10
4
 (No visible dust on desk in three days) 
NOTE: 
Dust particle diameter ≥ 5 μm 
 
Table 3 Harmful gas concentration limits 
Gas Max. (m
/m
3
)
SO
2
 0.2 
H
2
S 0.006