Cisco Systems OL-11497-03 manual Rack-Mounting Guidelines, Temperature and Humidity

Chapter 2 Preparing for Installation

Site Requirement Guidelines

•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 air is too warm, an overtemperature condition can occur within the router. Under extreme conditions, the environmental monitoring system shuts down the power to protect the router components.

Temperature and Humidity

The operating environmental site requirements are listed in Appendix A, “Technical Specifications.” The temperature and humidity ranges listed are those within which Cisco 12006 and Cisco 12406 Routers will continue to operate. You can maintain normal operation by anticipating and correcting environmental irregularities before they approach critical values.

The environmental monitoring functionality built into Cisco 12006 and

Cisco 12406 Routers protects the system and components from potential damage from overvoltage and overtemperature conditions. To assure normal operation and avoid maintenance difficulty, plan and prepare your site before you install the router.

Rack-Mounting Guidelines

Before installing Cisco 12006 and Cisco 12406 Routers in a rack, consider the general rack-mounting guidelines in the following sections.

Types of Equipment Racks

Cisco 12006 and Cisco 12406 Routers can be mounted in most two-post, four-post, or telco-type 19-inch equipment racks that comply with the Electronics Industries Association (EIA) standard for equipment racks (EIA-310-D). The rack must have at least two posts with mounting flanges on which to mount the router chassis. The distance between the center lines of the mounting holes on the two mounting posts must be 18.31 inches ± 0.06 inch (46.50 cm ± 0.15 cm).

	Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
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