3Com Router 3016, Installation Manual

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2
P
REPARING TO
I
NSTALL THE
R
OUTER
Safety Warnings
As you prepare to install your router, consider the following safety guidelines:
■
Switch off the power supply before connecting the cables.
■
Keep the router far away from any heat source.
■
To ensure normal heat dissipation, do not stack routers during the installation.
■
Do not keep a router in a damp place, and prevent liquid from getting into the
router.
■
Make sure that the neutral point of the power is grounded properly, to avoid
personal injury.
■
Make sure that the power is off before plugging or unplugging the interface
cards, modules and cables of the router.
■
Before removing the chassis, disconnect all the power cords and external
cables.
■
To avoid damage to the router, connect all the cables correctly, and never
connect telephone cables (including the ISDN lines) to the console or AUX port.
■
During the installation, wear the ESD (Electro-Static Discharge) preventive wrist
strap and ESD-preventive gloves. See the Static Electricity section in this chapter
for additional information on ESD prevention.
■
3Com recommends that you use an uninterrupted power supply (UPS) with
your router.
■
To enhance the anti-lightning-strike capability of the router, install a power
arrester at the front end of the power input, and a special arrester at the input
end of the outdoor cable, such as telephone cable, ISDN line or T1/E1 line.
General Site
Requirements
The environment of the installation site influences the performance and lifetime of
the router. In addition, if the router operates in inappropriate working
environment, its performance will become unreliable. The installation site for your
router should meet the following requirements for temperature and humidity,
dust, gases, static electricity, and electromagnetic discharge.
Temperature and
Humidity
To ensure normal operation and to prolong the operational lifetime of the router,
the equipment room must maintain adequate temperature and humidity. If the
equipment room is damp, it is likely to affect the performance of the insulating
material, which may result in electric leakage and lead to metal erosion.
If the equipment room is very dry, the insulating shim will contract, leading to
loosening of the fastening screws. In addition, static electricity will be produced,
which damages the complementary metal-oxide-semiconductor (CMOS) circuit on