Environmental Guidelines - Cisco 12404 Installation And Configuration Manual

Installation Site Requirements

Environmental Guidelines

Airflow
Cisco 12404 Internet Router Installation and Configuration Guide
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This section offers guidelines for operating your Cisco 12404 Internet router in
various environments; airflow, temperature and humidity, power source, AC and
DC powered routers, grounding connections and site wiring. To assure normal
operation and avoid maintenance difficulty, plan and prepare your site before you
install the router.
The Cisco 12404 router air circulation system consists of 1 fan tray assembly
mounted at the side of the chassis. The fan tray assembly maintains acceptable
operating temperatures for the internal components by drawing cooling air in
through a replaceable air filter, located on the right side of the chassis.
Air circulates through the card cage, and exhausts at the side of the chassis
(Figure 2-4).
Allow sufficient air flow by maintaining 6 inches (15.24 cm) of clearance at
•
both the inlet and exhaust openings on the chassis.
The site should be as dust-free as possible. Dusty environments can clog the
•
air filter, reducing the cooling airflow through the system. This can cause an
over temperature condition in the router.
Under extreme environment conditions, the environmental monitoring system
will shut down the power to protect the system components.
Chapter 2 Preparing for Installation
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