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pinout (распиновка)

Ethernet 100Base-T4 connector

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100Base-T4 uses all four pairs. 100Base-TX only uses two pairs

8 pin RJ45 FEMALE connector  at the network interface cards/hubs
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-

8 pin RJ45 MALE connector  at the cables

Note: TX & RX are swapped on Hub's. Don't know about Bi-directional data