5
Pre-installation checklist
Table 5 Pre-installation checklist
Item Requirements
Result
Installation site
Ventilation
•
There is a minimum clearance of 10 cm (3.94 in)
around the inlet and outlet air vents for heat
dissipation of the router chassis.
•
A good ventilation system is available at the
installation site.
Temperature
0°C to 45°C (32°F to 113°F).
Relative humidity
5% to 90% (noncondensing).
Cleanness
•
Dust
concentration
≤
3 × 10
4
particles/m
3
.
•
No visible dust on desk within three days.
ESD prevention
•
The equipment and floor are well grounded.
•
The equipment room is dust-proof.
•
The humidity and temperature are at an
acceptable level.
•
Wear an ESD wrist strap and uniform when
touching a circuit board.
•
Place the removed interface module on an
antistatic workbench, with the face upward, or
put it into an antistatic bag.
•
Touch only the edges, instead of electronic
components when observing or moving a
removed interface module.
EMI prevention
•
Take effective measures to protect the power
system from the power grid system.
•
Separate the protection ground of the router from
the grounding device or lightning protection
grounding device as far as possible.
•
Keep the router far away from radio stations,
radar and high-frequency devices working in
high current.
•
Use electromagnetic shielding when necessary.
Lightning
protection
•
The grounding cable of the chassis is well
grounded.
•
The grounding terminal of the AC power
receptacle is well grounded.
•
A port lightning arrester is installed. (Optional.)
•
A power lightning arrester is installed. (Optional.)
•
A signal lightning arrester is installed at the input
end of an external signal cable. (Optional.)
Electricity safety
•
Equip an uninterrupted power supply (UPS).
•
In case of emergency during operation, switch
off the external power switch.
Workbench
•
The workbench is stable enough.
•
The workbench is well grounded.
