Appendix A Connectors and Connection Media
1000BASE-T/100BASE-TX/10BASE-T Ports
The 1000BASE-T/100BASE-TX/10BASE-T is a port that supports adaptation of three rates, and automatic MDI/MDIX
Crossover at these three rates.
The 1000BASE-T complies with IEEE 802.3ab, and uses the cable of 100-ohm Category-5 or Supper Category-5 UTP or
STP, which can be up to 100 m.
The 1000BASE-T port uses four pairs of wires for transmission, all of which must be connected. Figure A-1 shows the
connections of the twisted pairs used by the 1000BASE-T port.
Figure A-1 Four Twisted Pairs of the 1000BASE-T
In addition to the above cables, the 100BASE-TX/10BASE-T can also use 100-ohm Category-3, 4, 5 cables for 10 Mbps,
and 100-ohm Category-5 cables for 100 Mbps, both of which can be up to 100 m. Figure A-2 shows the pinouts of the
100BASE-TX/10BASE-T.
Figure A-2 Pinouts of the 100BASE-TX/10BASE-T
Figure A-3 shows the straight-through and crossover cable connections for the 100BASE-TX/10BASE-T.
Figure A-3 Connections of the Twisted Pairs of the 100BASE-TX/10BASE-T
