RJ-45 Cables

Cisco products use the following three types of RJ-45 cables:

Straight-through
Crossover
Rolled

Cisco does not provide these cables; they are widely available from other sources.

Figure 7-43: 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 the following figure.

Figure 7-44: 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.
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.
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.

**Table 7-8: RJ-45 Straight-Through (Ethernet) Cable Pinouts**
Signal	Pin	Pin	Signal
Tx+	1	1	Tx+
Tx-	2	2	Tx-
Rx+	3	3	Rx+
-	4	4	-
-	5	5	-
Rx-	6	6	Rx-
-	7	7	-
-	8	8	-

**Table 7-9: RJ-45 Crossover (Ethernet) Cable Pinouts**
Signal	Pin	Pin	Signal
Tx+	1	3	Rx+
Tx-	2	6	Rx-
Rx+	3	1	Tx+
-	4	4	-
-	5	5	-
Rx-	6	2	Tx-
-	7	7	-
-	8	8	-

**Table 7-10: RJ-45 Rolled (Console) Cable Pinouts**
Signal	Pin	Pin	Signal
-	1	8	-
-	2	7	-
-	3	6	-
-	4	5	-
-	5	4	-
-	6	3	-
-	7	2	-
-	8	1	-

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RJ-45 Cables

RJ-45 Cables