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B-8
Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide
OL-12246-01
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
Console Port Adapter Pinouts
Table B-4 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.
Table B-5 lists 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.
Pin 1
200915
Pin 1
Pin 1 on one connector and
pin 1 on the other connector
should be different colors.
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
TxD 2 RxD
GND 5 GND
GND 5 GND
RxD 3 TxD
DSR 4 DTR
CTS 7 RTS