9
RJ-45 Pin Assignments
The UTP/STP ports will automatically sense for Fast Ethernet
(10Base-T/100Base-TX) or Gigabit Ethernet
(10Base-T/100Base-TX/1000Base-T) connection. 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 schema.
10/100Base-TX Pinouts
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 10Base-T/100Base-TX MDI and MDI-X port
pinouts.
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-)
