LevelOne FSW-1671 - Manual (Page 45)

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Appendix
10 /100BASE-TX Pin outs
With10/100BASE-TX cable, pins 1 and 2 are used for transmitting data, and pins 3
and 6 for receiving data.
RJ-45 Pin Assignments
Pin Number Assignment
1 Tx+
2 Tx-
3 Rx+
6 Rx-
10/100Base-TX Cable Schematic
The following two figures show the 10/100Base-TX cable schematic
Straight-through cable schematic