Cisco CGS 2520 Hardware Installation Manual page 79

Appendix B Connector and Cable Specifications
Figure B-6
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Figure B-7
Switch
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Figure B-8
Switch
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
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.
OL-31444-01
Two Twisted-Pair Crossover Cable Schematic for 10/100 Ports
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Four Twisted-Pair Straight-Through Cable Schematic for 1000BASE-T Ports
Router or PC
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Four Twisted-Pair Crossover Cable Schematics for 1000BASE-T Ports
Switch
1 TP0+
2 TP0-
3 TP1+
6 TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
Cisco CGS 2520 Hardware Installation Guide
Cables and Adapters
B-7