A.3 Switch's RJ-45 Pin Assignments - 10/100Mbps, 10/100Base-TX
When connecting your Switch to another Fast Ethernet 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:
RJ-45 Connector pin assignment
Contact
MDI
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
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