Cisco 2960 8TC Hardware Installation Guide - Page 58

Preparing for Installation Chapter 3 Switch Installation (8-Port Switches) • Do not stack switches or place switches side-by-side unless they are separated on all sides by at least 3 inches (7.6 cm) of clearance from each other. • Allow at least 1.75 inches (4 cm) of clearance above each switch in the rack. • Do not wall-mount the switch with its front panel facing up or sideways. According to safety regulations, wall-mount the switch with its front panel facing down to prevent airflow restriction and to provide easier access to the cables. • Clearance to the switch front and rear panels meets these conditions - You can easily read the front-panel indicators. - Access to ports is sufficient for unrestricted cabling. - The AC power cord can reach from the AC power outlet to the connector on the switch rear panel. • Cabling is away from sources of electrical noise, such as radios, power lines, and fluorescent lighting fixtures. Make sure the cabling is safely away from other devices that might damage the cables. • For 10/100/1000 ports, cable lengths from the switch to connected devices must be 328 feet (100 meters). • The cables meet the specifications in Table B-1 on page B-5, which lists the cable specifications for 1000BASE-X and 100BASE-X small form-factor (SFP) modules available for the Catalyst 2960 switch. When you use shorter lengths of single-mode fiber-optic cable, you might need to insert an inline optical attenuator in the link to avoid overloading the receiver. When the fiber-optic cable span is less than 15.43 miles (25 km), you should insert a 5-decibel (dB) or 10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the 1000BASE-ZX SFP module at each end of the link. Equipment That You Supply This section is specific to the Catalyst 2960 8-port switches. For information applicable to the other Catalyst 2960 switches, see Chapter 2, "Switch Installation (24- and 48-Port Switches)." You need this equipment to install the switch: • Number-2 Phillips screwdriver • Drill with a #27 drill bit (0.144-inch [3.7 mm]) You can order an optional cable guard to secure cables to the front of the switch and prevent them from being accidentally removed. To order a cable guard, contact your Cisco representative and use these part numbers: • Catalyst 2960-8TC-L, 2960-8TC-S, and 2960PD-8TT-L switches cable guard part number: CBLGRD-C2960-8TC= • Catalyst 2960G-8TC-L switch cable guard part number: CBLGRD-C2960G-8TC= The cable guard is a different part than the cable guide, which you can use to manage a large number of cables in a rack on switches other than the Catalyst 2960-8TC-L and Catalyst 2960G-8TC-L switches. The switch has security slots in the left and right side panels. You can install an optional cable lock, such as the type that is used to secure a laptop computer, to secure either or both sides of the switch. Cable locks are available from most computer accessory suppliers. Catalyst 2960 Switch Hardware Installation Guide 3-4 OL-7075-09