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B-8
Catalyst 2940 Switch Hardware Installation Guide
OL-6157-01
Appendix B Connectors and Cables
Cable and Adapter Specifications
Cable and Adapter Pinouts
This section describes the cable and adapter pinouts and also describes how to identify a rollover cable.
Connecting to a PC
Use the supplied RJ-45-to-DB-9 adapter cable to connect the console port to a PC running
terminal-emulation software. Table B-2 lists the pinouts for the console port and the RJ-45-to-DB-9
adapter cable.
Connecting to a Terminal
Use the supplied RJ-45-to-DB-9 adapter cable and an RJ-45-to-DB-25 female DTE adapter to connect
the console port to a terminal. Table B-3 lists the pinouts for the console port, the adapter cable, and the
RJ-45-to-DB-25 adapter.
Note The RJ-45-to-DB-25 female DTE adapter is not supplied with the switch. You can order a kit (part
number ACS-DSBUASYN=) with that adapter from Cisco.
Table B-2 Console Port Signaling and RJ-45-to-DB-9 Adapter Cabling
Console
Port (DTE)
RJ-45-to-DB-9
Adapter Cable
Console
Device
Signal RJ-45 Pin DB-9 Pin Signal
RTS 1 8 CTS
Not connected 2 6 DSR
TxD 3 2 RxD
GND 4 5 GND
GND 5 5 GND
RxD 6 3 TxD
Not connected 7 4 DTR
CTS 8 7 RTS