RJ-45 Cables

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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.
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.

**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	-

**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	-

**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	-