Cisco 3524XL Hardware Installation Guide - Page 26

Front-Panel Description Chapter 1 Product Overview 10/100 Ports The 10/100 ports on the Catalyst 3512, 3524, 3524-PWR, and 3548 XL switches are grouped in pairs. For example, in Figure 1-3, Figure 1-4, Figure 1-5, and Figure 1-6, ports 1 and 2 are the left-most pair. The first member of the pair (port 1) is above the second member (port 2). Port 3 is above port 4, and so on. The 10/100 switch ports can connect, up to a distance of 100 meters, to any compatible network device: • 10BaseT-compatible devices such as workstations, Cisco IP Phones, and hubs through standard RJ-45 connectors and Category 3, 4, or 5 cabling • 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. Catalyst 3500 Series XL Hardware Installation Guide 1-8 78-6456-03