What does RJ45 interface mean?

RJ45 Network Cable (rj455 network cable) design interface description In the embedded industrial control system, the commonly used 10Mbps/100Mbps network interface. However, due to the rapid development of CPUs, 1000Mbps networks have also begun to be used in embedded systems. Their communication frequency is 100BASE-TX standard 125MHz. Kevlar's finished network jumpers can provide 1000, which conforms to the interface network 1000BASE-T (802.3ab) standard. For 10Mbps/100Mbps network IEEE:
For the 1000Mbps network provided by Kaiweier, it can be backward compatible with 10Mbps/100Mbps networks, using 4 pairs of differential signal lines, and when data is transmitted, all 4 pairs of differential signal lines will be used. Therefore, the requirements for PCB routing are higher. However, many customers did not design according to the differential and impedance requirements of the Ethernet signal when designing the wiring of the Ethernet port, or did not consider the ESD related issues of the network port, which eventually caused some devices to appear unexpectedly. Abnormal, or a situation with a high damage rate. Need to pay attention to when designing the network interface to improve the stability and reliability of the product. 1. The network signal wiring requirements are the same as the UTP CAT5e network cable commonly used in network communication. It has an impedance of 100 ohms at a frequency of 1Mhz-100Mhz. Therefore, in order to obtain better signal transmission characteristics, each pair of differential signal lines also need to be designed/produced. 10 impedance

The RJ45 interface is usually used for data transmission, and the most common one is for network cables. RJ45 is one of the different types of connectors (for example, RJ11 is also a type of connector, but it is used on telephone lines); there are two different ways of ordering RJ45 connections, one is orange white, orange, and green. White, blue, blue and white, green, brown and white, brown; the other is green and white, green, orange and white, blue, blue and white, orange, brown and white, brown; therefore, there are two types of lines that use RJ45 connectors, namely: straight line , Interleaved line.