RJ45介面訊號定義，以及網線連線頭訊號安排

乙太網 10/100Base-T 介面:

Pin Name Description

1 TX+ Tranceive Data+ (發訊號+)

2 TX- Tranceive Data- (發訊號-)

3 RX+ Receive Data+ (收訊號+)

4 n/c Not connected (空腳)

5 n/c Not connected (空腳)

6 RX- Receive Data- (收訊號-)

7 n/c Not connected (空腳)

8 n/c Not connected (空腳)

乙太網 100Base-T4 介面:

Pin Name Description

1 TX_D1+ Tranceive Data+

2 TX_D1- Tranceive Data-

3 RX_D2+ Receive Data+

4 BI_D3+ Bi-directional Data+

5 BI_D3- Bi-directional Data-

6 RX_D2- Receive Data-

7 BI_D4+ Bi-directional Data+

8 BI_D4- Bi-directional Data-

1 white/orange

2 orange/white

3 white/green

4 blue/white

5 white/blue

6 green/white

7 white/brown

8 brown/white

注：RJ45介面採用差分傳輸方式，tx+、tx-是一對雙絞線，擰在一起可以減少干擾。