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Cable and Connectors
Cables and Adapters
Figure 31
Four Twisted-Pair Straight-Through Cable Schematic for 1000BASE-T Ports
Figure 32
Four Twisted-Pair Crossover Cable Schematics for 1000BASE-T Ports
To identify a crossover cable, hold the cable ends side-by-side, with the tab at the back. The wire connected to pin 1
on the left end should be the same color as the wire connected to pin 3 on the right end. The wire connected to pin 2
on the left end should be the same color as the wire connected to pin 6 on the right end.
Figure 33
Identifying a Crossover Cable
1 TP0+
2 TP0-
3 TP1+
6 TP1-
1 TP0+
2 TP0-
3 TP1+
6 TP1-
Switch
Router or PC
4 TP2+
5 TP2-
7 TP3+
8
TP3-
4 TP2+
5 TP2-
7 TP3+
8
TP3-
65271
1 TP0+
2 TP0-
3 TP1+
6 TP1-
1 TP0+
Switch
Switch
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8
TP3-
4 TP2+
5 TP2-
7 TP3+
8
TP3-
65274
Pin 1
Pin 2
273807
Pin 6
Pin 3