HP MSR1000 Router Series Installation Guide

4
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 effective measures to reduce interference from the power grid system.
• Separate the router grounding equipment from grounding and lightning protection equipment of
other devices as far as possible.
• Keep the router far away from radio transmitting stations, radar stations, and high-frequency
devices to make sure the EMI levels do not exceed the compliant range.
• Use electromagnetic shielding when necessary.
Lightning protection
To better protect the MSR1000 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, make sure the following requirements are met:
• The rack has a good ventilation system.
• The rack is sturdy enough to support the router and its accessories.
• The rack has enough space to accommodate the router.
• The front and rear of the rack are at least 0.8 m (2.62 ft) away from walls or other devices. Leave
enough clearance on both sides of the rack.
• The height of the equipment room is no less than 3 m (9.84 ft).