Chapter2 Overview
Front-Panel Description
2-8
Catalyst2955 Hardware Installation Guide
78-14944-03
100BASE-FX Ports
The 100BASE-FX ports on the Catalyst 2955C-12 use 50/125- or
62.5/125-micron MM fiber-optic cabling. In full-duplex mode, the MM
fiber-optic cable length from a switch to an attached device cannot exceed
6562 feet (2 kilometers).
For MM connections, you can connect a 100BASE-FX port to a port on a target
device by using one of the MT-RJ fiber-optic patch cables listed in Tabl e B- 1 on
page B-3. Use the Cisco part numbers in Tabl e B-1 to order the patch cables that
you need.
100BASE-LX Ports
The 100BASE-LX ports on the Catalyst 2955S-12 use 9/125-micron SM
fiber-optic cabling. The cable length from a switch to an attached device cannot
exceed 9.375 miles (15 kilometers).
For SM connections, use one of the connectors listed in Table B-2 on page B-4.
Use the Cisco part numbers in Tab le B-2 to order the connectors that you need.
Power and Relay Connector
The power and relay connector provides wire connections to the switch for DC
power and configurable alarms (see Figure2-6). The power and relay connect or
is to the right of the uplink ports on the faceplate.
Figure2-6 Power and Relay Connector
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RT A1 A2 VB
VA A1
A2 RT