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B-9
Catalyst 3750 Switch Hardware Installation Guide
OL-6336-07
Appendix B Connector and Cable Specifications
Cable and Adapter Specifications
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure B-12 and Figure B-13 show the schematics of four twisted-pair cables for 10/100/1000 ports on
Catalyst 3750 switches.
Figure B-12 Four Twisted-Pair Straight-Through Cable Schematic for 10/100/1000 Ports
Figure B-13 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 and 1000BASE-T SFP
Module Ports
Crossover Cable and Adapter Pinouts
This section describes the adapter pinouts.
Table B-4 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.
1 TPO+
2 TPO-
3TP1+
6TP1-
1 TP1+
Switch Router or PC
2 TP1-
3 TPO+
6 TPO-
4TP2+
5TP2-
7TP3+
8TP3-
4 TP3+
5 TP3-
7 TP2+
8 TP2-
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1 TPO+
2 TPO-
3 TP1+
6 TP1-
1TP0+
Switch Switch
2TP0-
3TP1+
6TP1-
4 TP2+
5 TP2-
7 TP3+
8 TP3-
4TP2+
5TP2-
7TP3+
8TP3-
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Table B-4 Console Port Signaling Using a DB-9 Adapter
Switch Console
Port (DTE)
RJ-45-to-DB-9
Terminal Adapter
Console
Device
Signal DB-9 Pin Signal
RTS 8 CTS
DTR 6 DSR