RJ45接口信号定义，以及网线连接头信号安排
以太网10/100Base-T接口:
PinNameDescription
1TX+TranceiveData+(发信号+)
2TX-TranceiveData-(发信号-)
3RX+ReceiveData+(收信号+)
4n/cNotconnected(空脚)
5n/cNotconnected(空脚)
6RX-ReceiveData-(收信号-)
7n/cNotconnected(空脚)
8n/cNotconnected(空脚)
以太网100Base-T4接口:
PinNameDescription
1TX_D1+TranceiveData+
2TX_D1-TranceiveData-
3RX_D2+ReceiveData+
4BI_D3+Bi-directionalData+
5BI_D3-Bi-directionalData-
6RX_D2-ReceiveData-
7BI_D4+Bi-directionalData+
8BI_D4-Bi-directionalData-
1white/orange
2orange/white
3white/green
4blue/white
5white/blue
6green/white
7white/brown
8brown/white
注：RJ45接口采用差分传输方式，tx+、tx-是一对双绞线，拧在一起可以减少干扰。
