B-7
Cisco ME 3400E Ethernet Access Switch Hardware Installation Guide
OL-16447-01
Appendix B Connector and Cable Specifications
Cables and Adapters
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 pin 1 on the left plug should be the same
color as the wire connected to pin 3 on the right plug. The wire connected to pin 2 on the left plug should
be the same color as the wire connected to pin 6 on the right plug.
Figure B-10 Identifying a Crossover Cable
Console Port Adapter Pinouts
The console port uses an 8-pin RJ-45 connector, which is described in Table B-2 and Ta ble B-3. If you
did not order a console cable with your switch, you need to provide an RJ-45-to-DB-9 adapter cable to
connect the console port of the switch to a console PC. You need to provide an RJ-45-to-DB-25 female
DTE adapter if you want to connect the switch console port to a terminal. You can order a kit (part
number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout
information, see Table B-2 and Table B-3.
Table B-2 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.
Pin 1
Pin 2
273807
Pin 6
Pin 3
Table B-2 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 8CTS
DTR 6DSR
TxD 2RxD
GND 5GND
GND 5GND
RxD 3TxD
DSR 4DTR
CTS 7RTS