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Appendix A: RJ-45 Pin Assignment
10/100Mbps, 10/100Base-TX
When connecting your 10/100Mbps Ethernet Switch to another switch, a bridge or a
hub, a straight or crossover cable is necessary. Each port of the Switch supports
auto-MDI/MDI-X detection. That means you can directly connect the Switch to any
Ethernet devices without making a crossover cable. The following table and diagram
show the standard RJ-45 receptacle/ connector and their pin assignments:
Contact
Media Dependant Interface
1
Tx + (transmit)
2
Tx - (transmit)
3
Rx + (receive)
4, 5
Not used
6
Rx - (receive)
7, 8
Not used
The standard cable, RJ-45 pin assignment
1 2 3 4 5
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:
204
RJ-45 Connector pin assignment
MDI
6 7 8
8 7 6 5 4
3 2 1
The standard RJ-45 receptacle/connector
MDI-X
Media Dependant Interface-Cross
Rx + (receive)
Rx - (receive)
Tx + (transmit)
Tx - (transmit)
GE-DS-242-PoE Managed Ethernet Switch User Manual
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