Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or
view directly with optical instruments. Statement 1051
Warning
Make sure that the optical connectors are clean before making the connections. Contaminated connectors can
damage the fiber and cause data errors.
Note
Figure 33: LC Fiber-Optic Connector
Cables and Adapters
SFP Module Cables
For cabling specifications, refer to the following notes:
• Cisco SFP and SFP+ Transceiver Module Installation Notes
• Cisco 40-Gigabit QSFP+ Transceiver Modules Installation Note
Each port must match the wave-length specifications on the other end of the cable, and the cable must not
exceed the stipulated cable length. Copper 1000BASE-T SFP module transceivers use standard four twisted-pair,
Category 5 cable at lengths up to 328 feet (100 meters).
Cable Pinouts
Figure 34: Four Twisted-Pair Straight-Through Cable Schematic
Catalyst 6840-X Switch Series Hardware Installation Guide
72
Module Connectors and Cable Specifications
Cables and Adapters
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