Table Of Contents
10BaseT and 100BaseTX Connectors
RJ-45 to DB-9 or DB-25 Serial Cable
Cable Pinouts
The appendix provides the following pinout information:
•
10BaseT and 100BaseTX Connectors
•
RJ-45 to DB-9 or DB-25 Serial Cable
10BaseT and 100BaseTX Connectors
The 10BaseT and 100BaseTX ports use standard RJ-45 connectors. The 10BaseT and 100BaseTX ports have their transmit (TD) and receive (RD) pairs internally crossed.
Figure A-1 shows the 10BaseT and the 100BaseTX connector (RJ-45).
Figure A-1 RJ-45 10BaseT and 100BaseTX Connector
Table A-1 shows the connector pinout.
Table A-1 10BaseT and 100BaseTX Connector (RJ-45) Pinouts
Pin Description1
TX+
2
TX-
3
RX+
4
-
5
-
6
RX-
7
-
8
-
Console Port (RJ-45)
Cisco products use the following three types of RJ-45 cables:
•
Straight-through
•
Crossover
•
Rolled
Note
Cisco does not provide these cables; they are widely available from other sources.
Figure A-2 shows the RJ 45 cable.
Figure A-2 RJ-45 Cable
To identify the RJ-45 cable type, hold the two ends of the cable next to each other so you can see the colored wires inside the ends, as shown in Figure A-3.
Figure A-3 RJ-45 Cable Identification
Examine the sequence of colored wires to determine the type of RJ-45 cable, as follows:
•
Straight-through—The colored wires are in the same sequence at both ends of the cable (see Table A-2).
•
Crossover—The first (far left) colored wire at one end of the cable is the third colored wire at the other end of the cable (see Table A-3).
•
Rolled—The colored wires at one end of the cable are in the reverse sequence of the colored wires at the other end of the cable (see Table A-4).
Table A-2 RJ-45 Straight-Through (Ethernet) Cable Pinouts
Signal Pin Pin PinTX+
1
1
TX+
TX-
2
2
TX-
RX+
3
3
RX+
-
4
4
-
-
5
5
-
RX-
6
6
RX-
-
7
7
-
-
8
8
-
Table A-3 RJ-45 Crossover (Ethernet) Cable Pinouts
Signal Pin Pin PinTX+
1
3
RX+
TX-
2
6
RX-
RX+
3
1
TX+
-
4
4
-
-
5
5
-
RX-
6
2
TX-
-
7
7
-
-
8
8
-
Table A-4 RJ-45 Crossover (Ethernet) Cable Pinouts
Signal Pin Pin Pin-
1
8
-
-
2
7
-
-
3
6
-
-
4
5
-
-
5
4
-
-
6
3
-
-
7
2
-
-
8
1
-
RJ-45 to DB-9 or DB-25 Serial Cable
Table A-5 lists the cable pinouts for RJ-45 to DB-9 or DB-25.
Table A-5 Cable Pinouts for RJ-45 to DB-9 or DB-25
Signal RJ-45 Pin DB-9 Pin DB-25 PinRTS
8
8
5
DTR
7
6
6
TxD
6
2
3
GND
5
5
7
GND
4
5
7
RxD
3
3
2
DSR
2
4
20
CTS
1
7
4
Failover Cable Pinouts
Figure A-4 shows the pinouts of a crossover cable, should you use this with the Stateful Failover dedicated interface.
Figure A-4 Stateful Failover Dedicated Interface Crossover Cable Pinouts
To test the cable you received, the pinouts are shown in Figure A-5.
Figure A-5 Failover Serial Cable Pinouts
Note
Pins 11 and 12 on the primary side are looped.





