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Preparing to Install Cisco 4000 Series Routers 2-5
General Site Requirements
Site Configuration Precautions
The following precautions will help you plan an acceptable operating environment for your
router and will help you avoid environmentally caused equipment failures:
• Remember that electrical equipment generates heat. Ambient air temperature might not
be adequate to cool equipment to acceptable operating temperatures without adequate
circulation. Ensure that the room in which your system operates has adequate
circulation.
• Never place chassis side by side because the heated exhaust air from one chassis can be
drawn into the intake port of the next.
• Always follow the ESD-prevention procedures in the section “Preventing Electrostatic
Discharge Damage” earlier in this chapter to avoid damage to equipment. Damage from
static discharge can cause immediate or intermittent equipment failure.
• Ensure that the chassis cover and network processor module rear panels are secure. The
chassis is designed to allow cooling air to flow within it. An open chassis allows air
leaks, which may in turn interrupt and redirect the flow of cooling air across internal
components.
• Check the power at your site to ensure that you are receiving “clean” power (free of
spikes and noise). Install a power conditioner if necessary.
Warning The device is designed to work with TN power systems. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)
• Install proper grounding to avoid damage from lightning and power surges.