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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-
[NOTE] “+” and “-” signs represent the polarity of the wires that make up each
wire pair.
The table below shows the 10 / 100BASE-TX MDI and MDI-X port pin outs.
Pin MDI-X Signal Name MDI Signal Name
1 Receive Data plus (RD+) Transmit Data plus (TD+)
2 Receive Data minus (RD-) Transmit Data minus (TD-)
3 Transmit Data plus (TD+) Receive Data plus (RD+)
6 Transmit Data minus (TD-) Receive Data minus (RD-)
10/100Base-TX Cable Schematic
The following two figures show the 10/100Base-TX cable schematic.