Cisco Catalyst 2900 Series Hardware Installation Manual page 15

Chapter 1 Overview
Note
100BaseFX Modules
1000BaseX Modules
Table 1-4 GBIC Cable Specifications
GBIC
Shortwave (SX)
78-5912-03
The 10/100 ports are numbered 1X through 4X. The X indicates that the pins on
the port connector are internally crossed. If you are connecting to a device with
ports marked with an X, such as another switch or hub, use a crossover cable. If
you are connecting to devices with ports not marked with an X, such as a PC,
workstation, or server, use a straight-through cable.
For the connector pinouts and schematics, see the section "10/100 Module
Cabling" in Appendix B, "Connectors and Cables."
Always observe the following general rules when connecting
devices: Use a straight-through cable to connect two ports when one
is designated with an X; use a crossover cable to connect two ports
when both are designated with an X.
The 100BaseFX ports use 50/125- or 62.5/125-micron multimode fiber-optic
cabling with duplex SC connectors. When set to run in full-duplex mode,
100BaseFX module ports can connect to compatible devices over distances of up
to 2 kilometers. For connector and schematic information, see Appendix B,
"Connectors and Cables."
GBICs require the following fiber-optic cables with duplex SC connectors.
Wavelength (nm)
850
Catalyst 2900 Series XL Modules Hardware Installation Guide
Core Size
Fiber Type (micron)
MMF 62.5
62.5
50.0
50.0
Cabling Guidelines
Modal
Bandwidth Cable Distance
(MHz.km) Maximum
160 722 ft (220 m)
200 902 ft (275 m)
400 1640 ft (500 m)
500 1804 ft (550 m)
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