Cisco 10720 Configuration Guide - Page 44

Environmental Safety Guidelines Chapter 2 Preparing for Installation Environmental Safety Guidelines This section offers guidelines for operating your Cisco 10720 Internet Router in various environments: • Airflow Guidelines, page 2-8 • Temperature and Humidity Guidelines, page 2-8 • Power Guidelines, page 2-9 • Site Wiring Distance and Interference Guidelines, page 2-10 • Cable Management, page 2-11 • Mounting the Router, page 2-11 Airflow Guidelines The Cisco 10720 Internet Router air circulation system consists of four fans installed in the back of the router chassis. The fan assembly maintains acceptable operating temperatures for the internal components by drawing cooling air in through vents located on the front of the router chassis, circulating the air through the router, and exhausting the air out of the back of the router chassis. Observe the following guidelines when selecting a site at which to install the Cisco 10720 Internet Router: Note Warm air exhausts out the back side of the router by drawing cool air in through vents located on the front of the router chassis. Allow sufficient air flow by maintaining 6 inches (15.24 cm) of clearance at both the inlet and exhaust openings on the router and 0.75 inch (19.1 mm) on each side of the router chassis. • The site should be as dust-free as possible. • Under extreme environment conditions, the environmental monitoring system will shut down the power to protect the system components. Temperature and Humidity Guidelines The operating environmental site requirements are located in Appendix A, "Technical Specifications." The temperature and humidity ranges listed are those within which the router 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 the router protects the system and its components from potential damage from overvoltage and overtemperature conditions. To assure normal operation and avoid maintenance difficulty, plan and prepare your site before installing the router. Cisco 10720 Internet Router Installation and Configuration Guide 2-8 78-13062-10