RJ-45 Connector pin assignment
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Media Dependant
Interface
MDI-X
Media Dependant
Interface - Cross
1 Tx + (transmit) RX + (receive)
2 Tx - (transmit) RX - (receive)
3 Rx + (receive) TX + (transmit)
4, 5 Not used
6 RX – (receive) TX – (transmit)
7, 8 Not used
The standard cable, RJ-45 pin assignment
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:
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