10Base-T/100Base-Tx Pin Assignments - SMC Networks -GT1255FTX-SC User Manual

The following figure illustrates how the pins on the RJ-45
connector are numbered. Be sure to hold the connectors in the
same orientation when attaching the wires to the pins.
Figure 4. RJ-45 Connector Pin Numbers

10BASE-T/100BASE-TX Pin Assignments

With 10BASE-T/100BASE-TX cable, pins 1 and 2 are used for
transmitting data, and pins 3 and 6 for receiving data. The "+" and
"-" signs in the tables below are used to represent the polarity of
the wires that make up each wire pair.
RJ-45 Pin Assignments
Pin Number
1
2
3
6
T
WISTED
Assignment
Tx+
Tx-
Rx+
Rx-
-P C
AIR ABLE AND
P A
IN SSIGNMENTS
31