RJ-45 Connector pin assignment
Contact
MDI
Media Dependant
Interface
1
Tx + (transmit)
2
Tx - (transmit)
3
Rx + (receive)
4, 5
6
RX – (receive)
7, 8
The standard cable, RJ-45 pin assignment
A.3 RJ-45 Plug, Jack pin out
The standard RJ-45 receptacle/.connector
There are 8 wires on a standard UTP/STP cable and each wire is
color-coded. The following shows the pin allocation and color of
straight cable and crossover cable connection:
MDI-X
Media Dependant
Interface - Cross
RX + (receive)
RX - (receive)
TX + (transmit)
Not used
TX – (transmit)
Not used