Appendix B Connectors and Cables
Cable and Adapter Specifications
B-8
Catalyst 2950 Desktop Switch Hardware Installation Guide
78-11157-05
Console Port
The console port uses an 8-pin RJ-45 connector. You can connect a switch to a PC
through the console port and the supplied RJ-45-to-DB-9 adapter cable. If you
want to connect a switch to a terminal, you need to provide an RJ-45-to-DB-25
female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) with
that adapter from Cisco. For console-port and adapter-pinout information, see
Table B-3 and Table B-4.
Cable and Adapter Specifications
These sections describe the cables and adapters used with Catalyst 2950 switches.
• Two Twisted-Pair Cable Pinouts, page B-8
• Four Twisted-Pair Cable Pinouts for 10/100 Ports, page B-9
• Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, page B-10
• RJ-21 Cable Pinouts, page B-11
• Rollover Cable and Adapter Pinouts, page B-14
Two Twisted-Pair Cable Pinouts
Figure B-8 and Figure B-9 show the schematics of two twisted-pair cables for
10/100 ports.
Figure B-8 Two Twisted-Pair Straight-Through Cable Schematic for
10/100 Ports
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Switch
3 RD+
6 RD–
1 TD+
2 TD–
H5578
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