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Appendix B
RJ-45 Pin Specification
When connecting your FSD-series 10/100Mbps Ethernet Switch to another switch, a
bridge or a hub, a modied crossover cable is not necessary. Each port of the Switch
is auto-MDI detection. That means you can direct connect the Switch to any Ethernet
devices with a Category 5, UTP straight wire.
However, the following diagram and tables also show the standard RJ-45 receptacle/
connector and their pin assignments for the switch-to-network adapter card connection,
and the straight / crossover cable for the Switch-to-switch/hub/bridge connection.
RJ-45 Connector pin assignment
Contact Media Direct Interface Signal Media Direct 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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