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An RJ45 female connector is used in Ethernet networking applications and is commonly found in wall outlets, patch panels, or directly on network devices. It has 8 pins, arranged in a standard pattern. The pinout follows either the T568A or T568B wiring standard, depending on the cabling setup.

RJ45 Female Pinout Diagram (Front View)

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| 1 2 3 4 5 6 7 8 |

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Pin Functions for T568A and T568B

Pin Number	T568A Wire Color	T568B Wire Color	Signal
1	White/Green	White/Orange	Transmit + (TX+)
2	Green	Orange	Transmit – (TX-)
3	White/Orange	White/Green	Receive + (RX+)
4	Blue	Blue	Not Used (PoE+)
5	White/Blue	White/Blue	Not Used (PoE-)
6	Orange	Green	Receive – (RX-)
7	White/Brown	White/Brown	Not Used (PoE+)
8	Brown	Brown	Not Used (PoE-)

1. T568A vs T568B:

– T568B is more commonly used in North America.

– T568A is often required for certain government installations or international applications.

– Both standards are functionally identical but differ in wire pair assignments.

2. Crossover Cables:

For connecting two computers or switches directly, a crossover cable is used. One end uses T568A, and the other uses T568B.

3. Straight-Through Cables:

Use the same standard (T568A or T568B) on both ends for standard network connections.

4. Power over Ethernet (PoE):

Pins 4, 5, 7, and 8 are used for PoE in some configurations.