支持IEEE 802.3i (10BASE-T)或IEEE 802.3u (100BASE-TX)的连接设备
1 TD+ ---Twisted-pair output (differential output)
2 TD- ---Twisted-pair output (differential output)
3 RD+ ---Twisted-pair input (differential input)
4 BI D+ --Protection circuit
5 BI D- ---Protection circuit
6 RD- ----Twisted-pair input (differential input)
7 BI D+ --Protection circuit
8 BI D- ---Protection circuit