Chapter2 Overview
Front-Panel Description
2-6
Catalyst2955 Hardware Installation Guide
78-14944-03
Figure2-4 Laser Safety Warning Label
The hot surface warning label (shown in Figure 2-5) is on the Catalyst 2955C-12,
2955S-12, and 2955T-12 switch front panels. This label means that the surface of
the switch is hot. See Appendix C, “Translated Safety Warnings,” for more
information about proper handling guidelines for hot surfaces.
Figure2-5 Hot Surface Warning Label
10/100 Ports
The 10/100 ports use RJ-45 connectors and twisted-pair cabli ng. The ports can
connect to these devices:
•10BASE-T devices, such as workstations and hubs, through standard RJ-45
connectors and two twisted-pair cabling. You can use Category 3, 4, or 5
cabling.
•100BASE-TX devices, such as high-speed workstations, servers, hubs,
routers, and other switches, through standard RJ-45 connectors and two or
four twisted-pair, Category 5 cabling.
Note When connecting the switch to workstations, servers, and routers, be sure that the
cable is a twisted-pair straight-through cable. When connecting the switch to hubs
or other switches, use a twisted-pair crossover cable. Pinouts for the cables are
described in Appendix B, “Connectors and Cables.”
The 10/100 ports can be set to operate in any combination of half duplex, full
duplex, 10 Mbps, or 100 Mbps. They can also be set for speed and duplex
autonegotiation, compliant with IEEE 802.3U. In all cases, th e cable length from
a switch to an attached device cannot exceed 328 feet (100 meters).