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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Chapter 2 Preparing for Installation
Site Requirement Guidelines
Site Requirement Guidelines
This section provides the site requirement guidelines that you must consider
before installing Cisco
12006 and Cisco 12406 Routers:
• Environmental Guidelines, page 2-9
• Rack-Mounting Guidelines, page 2-10
• Power Connection Guidelines, page 2-14
• Site Wiring, page 2-20
Environmental Guidelines
This section offers guidelines for operating Cisco 12006 and Cisco 12406
Routers in various environments. The following environmental considerations are
discussed:
• Airflow
• Temperature and humidity
Airflow
The air circulation system for Cisco 12006 and Cisco 12406 Routers consists of
one blower module mounted at the rear of the chassis. The blower module
maintains acceptable operating temperatures for the internal components by
drawing cooling air in through replaceable air filters located on the right side of
the chassis. Air circulates through the card cage and exhausts at the rear of the
chassis.
Observe the following guidelines when selecting a site in which to install
Cisco
12006 and Cisco 12406 Routers:
• Dust free—The site should be as dust free as possible. Dusty environments
can clog the air filter or power supply intake vents, reducing the cooling air
flow through the router. This can cause an overtemperature condition in the
router.
• Air flow—Allow sufficient air flow by maintaining a minimum of 6 inches
(15.24
cm) of clearance at both the inlet and exhaust openings on the chassis
and the power modules. If the air flow is blocked or restricted, or if the inlet