Cisco WS-C3560-8PC-S Installation Guide - Page 32

Front-Panel Description Chapter 1 Product Overview • 100BaseTX-compatible devices such as high-speed workstations, Cisco IP Phones, servers, hubs, routers, and other switches through standard RJ-45 connectors and Category 5 cabling Note Category 5 cable is required for 100BaseTX traffic. Ports operating at 10 Mbps can use Category 3 and 4 cables, but these cables do not work for ports operating at 100 Mbps. When connecting the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable is a straight-through, twisted-pair cable. When connecting the switch to switches or hubs, use a crossover cable. Pinouts for the cables are described in Appendix B, "Connector and Cable Specifications." The 10/100 switch ports can be explicitly set to operate in any combination of half duplex, full duplex, 10 Mbps, or 100 Mbps. These ports also can be set for speed and duplex autonegotiation, compliant with IEEE 802.3u. When set for autonegotiation, the port can sense the speed and duplex settings of the attached device and advertises its own capabilities. If the connected device also supports autonegotiation, the switch port negotiates the best connection (that is, the fastest line speed that both devices support and full-duplex transmission, if the attached device supports it) and configures itself accordingly. The 10/100 ports on the Catalyst 3512, 3524, 3524-PWR, and 3548 XL switches provide protocol support for Cisco IP Phones. The Catalyst 3548 and 3524-PWR XL switches also support per-port priority override. Refer to the Cisco IOS Desktop Switching Software Configuration Guide for more information about these features. Cisco IP Phones-connected to the 10/100 ports on the Catalyst 3512, 3524, and 3548 XL switches-must be connected to an AC power source. However, the Catalyst 3524-PWR XL 10/100 ports can: • Provide -48V DC power to the following phones: Cisco IP Phone 7960, Cisco IP Phone 7940, and Cisco IP Phone 7910 • Automatically detect if a Cisco IP Phone is connected On a per-port basis, you can control whether or not a Catalyst 3524-PWR XL 10/100 port automatically provides power when a Cisco IP Phone is connected. CMS and the CLI provide two inline power settings for each 10/100 port: Auto and Never. When you select the Auto setting for inline power on a port, the port Catalyst 3500 Series XL Hardware Installation Guide 1-8 78-6456-04