S7800 Series Hardware Installation Guide Appendix A
AppendixA
Connectors
and
Connection Media
1. 1000BASE-T/100BASE-TX/10BASE-T Port
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 up to 100m of 100-ohm Category-5 or Supper Category-5 UTP or STP
cable. 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
Straight-Through
Crossover
Switch
Switch
1TP0+
1TP0+
2TP0-
2TP0-
3TP1+
3TP1+
6TP1-
6TP1-
4TP2+
4TP2+
5TP2-
5TP2-
7TP3+
7TP3+
8TP3-
8TP3-
Switch Switch
1TP0+
1TP0+
2TP0-
2TP0-
3TP1+
3TP1+
6TP1-
6TP1-
4TP2+
4TP2+
5TP2-
5TP2-
7TP3+
7TP3+
8TP3-
8TP3-
In addition to the above cables, the 100BASE-TX/10BASE-T can also use up to 100m of
10Mbps 100-ohm Category-3, 4, 5 cables and 100Mbps 100-ohm Category-5 cables. Figure
A-2 shows the connections of the twisted pairs of the 100BASE-TX/10BASE-T:
Figure A-2
Twisted pairs of the 100BASE-TX/10BASE-T
Figure A-3 shows the connections of the straight-through and crossover twisted pairs of the
100BASE-TX/10BASE-T.
