Cisco 10720 Configuration Guide - Page 42

Rack-Mounting Guidelines Chapter 2 Preparing for Installation Rack-Mounting Clearance Guidelines The rack-mounting hardware included with the Cisco 10720 Internet Router is suitable for most 19-inch EIA, 23- or 24-inch EIA, or ETSI equipment racks or Telco-style racks. The following are rack-mounting guidelines for the Cisco 10720 Internet Router: • If you use a Telco-style rack, be sure that the rack is bolted to the floor, the router mounts to the two rack posts, and the rest of the router is cantilevered off the posts. • Some Telco-style racks are secured to ceiling brackets, if necessary, because of the weight of the equipment in the rack. Make sure that the rack on which you are installing the Cisco 10720 Internet Router is secured. 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 airflow by maintaining 6 inches (15.24 cm) of clearance at both the inlet and exhaust openings on the router and 0.75 inch (1.9 cm) on each side of the router chassis. Maintenance Guidelines for Multiple Routers in a Rack The Cisco 10720 Internet Router is 17.50 inches (44.45 cm) wide by 3.45 inches (8.76 cm) high by 18.25 inches (46.36 cm) deep. The height is equivalent to two rack units (RU). The router is 21.80 inches (55.37 cm) deep when the cable-management tray is installed. When placing multiple routers in a rack, ensure that there is sufficient ventilation to accommodate the routers. The heated exhaust air from other equipment can enter the inlet air vents and cause overheating inside the router. To avoid this, follow these guidelines: • Install and use the cable-management system included with the router to keep cables organized and out of the way of the cards and power supply. • Ensure that cables from other equipment do not interfere with access to the cards and LEDs located in the front of the router. • When mounting the router in a rack, be sure to use all the screws provided to secure the router to the rack posts. Cisco 10720 Internet Router Installation and Configuration Guide 2-6 78-13062-10