APPENDIX A RJ-45 PIN SPECIFICATION

When connecting your FSD-series 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:

RJ-45 Connector pin assignment

 

 

Contact

 

 

MDI

 

 

MDI-X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Media Dependant

 

 

Media Dependant

 

 

 

 

 

 

 

Interface

 

 

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

 

 

Note: Contact 4, 5, 7, 8 is not used for port # 2 to port #8. And will be used in port#1 (POE port) for IEEE802.3af power transmission.

The standard cable, RJ-45 pin assignment

The standard RJ-45 receptacle/connector