H3C MSR 26-00-10, Руководство по установке

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EMI
Electromagnetic interference (EMI) might be coupled from the source to the router through the following
coupling mechanisms:
• Capacitive coupling
•
Inductive coupling
•
Radiative coupling
• Common impedance coupling
• Conductive coupling
To prevent EMI, take the following actions:
•
Take measures against interference from the power grid.
• Do not use the router together with the grounding equipment or lightning-prevention equipment of
power equipment, and keep the router far away from them.
•
Keep the router far away from high-power radio launchers, radars, and equipment with high
frequency or high current.
• Use electromagnetic shielding when necessary.
Lightning protection
To better protect the router from lightning, do as follows:
• Make sure the grounding cable of the chassis is correctly grounded.
•
Make sure the grounding terminal of the AC power receptacle is correctly grounded.
•
Install a lightning arrester at the input end of the power supply to enhance the lightning protection
capability of the power supply.
• Install a special lightning arrester at the input end of outdoor signal lines (for example, E1/T1 line)
to which interface modules of the router are connected to enhance the lightning protection
capability.
Rack-mounting
Before mounting the router in a rack, adhere to the following requirements:
•
The rack is equipped with a good ventilation system.
• The rack is sturdy enough to support the router and its accessories.
•
For heat dissipation and device maintenance, make sure the front and rear of the rack are at least
0.8 m (2.62 ft) away from walls or other devices, and the headroom in the equipment room is no
less than 3 m (9.84 ft).