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B-1
Appendix B: Cables
Specifications
.
Twisted-Pair Cable and Pin Assignments
Caution: DO NOT plug a phone jack connector into any RJ-45 port. Use only twisted-pair
cables with RJ-45 connectors that conform with FCC standards.
Caution: Each wire pair must be attached to the RJ-45 connectors in a specific
orientation. (See “Cabling Guidelines” on page 4-1 for an explanation.)
Figure B-1 illustrates how the pins on the RJ-45 connector are numbered. Be sure to
hold the connectors in the same orientation when attaching the wires to the pins.
Figure B-1. RJ-45 Connector Pin Numbers
Cable Types and Specifications
Cable Type Max. Length Connector
10BASE-T Cat. 3, 4, 5 100-ohm UTP 100 m (328 ft) RJ-45
100BASE-TX Cat. 5 100-ohm UTP 100 m (328 ft) RJ-45
1000BASE-SX 50/125 or 62.5/125 micron core MMF See the following table SC or ST
1000BASE-LX 9/125 micron SMF 5 km (3.12 miles) SC or ST
1000BASE-LH 9/125 micron SMF 70 km (43.5 miles) SC or ST
100BASE-FX 50/125 or 62.5/125 micron multimode fiber
optic cable
2 km (1.24 miles) MTRJ
100BASE-FX 9/125 micron single-mode fiber optic cable 20 km (12.43 miles) MTRJ
1000BASE-T Cat. 5, 5e 100-ohm UTP 100 m (328 ft) RJ-45
1000BASE-SX Fiber Specifications
Fiber Diameter Fiber Bandwidth Maximum Cable Length
62.5/125 micron MMF 160 MHz/km 2-220 m (7-722 ft)
200 MHz/km 2-275 m (7-902 ft)
50/125 micron MMF 400 MHz/km 2-500 m (7-1641 ft)
500 MHz/km 2-550 m (7-1805 ft)