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Appendix A Cable Specifications
Ethernet Type Cable Requirements Maximum Length
10BASE-T Category 3 or better, UTP or STP 100m
100BASE-TX Category 5 or better, UTP or STP 100m
100BASE-FX 62.5/125um and 50/125um MMF cables 2000m
1000BASE-T Category 5 or better, UTP or STP 100m
1000BASE-SX 62.5/125um MMF 160MHz-km cables 220m
1000BASE-SX 62.5/125um MMF 200MHz-km cables 275m
1000BASE-SX 50/125um MMF 400MHz-km cables 500m
1000BASE-SX 50/125um MMF 500MHz-km cables 550m
Note: Please do not use telephone cables. Telephone cables do not support Ethernet or Fast Ethernet
There are two types of cables: Straight Through Cables and Crossover Cables.
Category 5 UTP/STP cable has eight wires inside the sheath. The wires form four
pairs. Straight Through Cables has same pin-outs at both ends while Crossover
Cables has a different pin arrangement at each end.
Figure A-1 shows the standard RJ-45 receptacle and connector. Figure A-2 shows
the diagram of straight through cables. Figure A-2 shows the diagram of crossover
cables.
F
IG
A-1 T
HE STANDARD
RJ-45
RECEPTACLE
/
CONNECTOR