Lantech 2204F Series, User Manual

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Appendix A
—RJ-45 Pin Assignment
RJ-45 Pin Assignments
The UTP/STP ports will automatically sense for Fast Ethernet (10Base-T/100Base-TX
connections), or Gigabit Ethernet (10Base-T/100Base-TX/1000Base-T connections).
Auto MDI/MDIX means that the switch can connect to another switch or workstation
without changing straight through or crossover cabling. See the figures below for straight
through and crossover cable schematic.

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 Number 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-)