Cisco Systems 3120 manual Identifying a Crossover Cable, Console Port Adapter Pinouts, Device

Appendix B Connector and Cable Specifications

Cable and Adapter Specifications

Identifying a Crossover Cable

To identify a crossover cable, compare the two modular ends of the cable. Hold the cable ends side-by-side, with the tab at the back. The wire connected to the pin on the outside of the left plug should be a different color from the wire connected to the pin on the inside of the right plug. (See Figure B-10.)

Figure B-10 Identifying a Crossover Cable

Pin 1 on one connector and pin 1 on the other connector should be different colors.

Pin 1 Pin 1

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Console Port Adapter Pinouts

Table B-4lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.

Table B-4 Console Port Signaling Using a DB-9 Adapter

Switch
Console	RJ-45-to-DB-9	Console
Port (DTE)	Terminal Adapter	Device
Signal	DB-9 Pin	Signal
RTS	8	CTS
DTR	6	DSR
TxD	2	RxD
GND	5	GND
GND	5	GND
RxD	3	TxD
DSR	4	DTR
CTS	7	RTS

Table B-5lists the pinouts for the console port, RJ-45-to-DB-25 female DTE adapter, and the console device.

Note The RJ-45-to-DB-25 female DTE adapter is not supplied with the switch module. You can order a kit (part number ACS-DSBUASYN=) containing this adapter from Cisco.

Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide

B-8 OL-12246-01