Appendix B
RJ-45 Pin Specification
When connecting your FSD-series 10/100Mbps Ethernet Switch to another switch, a bridge or a hub, a modified 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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