Appendix a pin explain for rj-45 connector – TP-Link TL-SL2218WEB User Manual
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Appendix A Pin Explain For RJ-45 Connector
The switching port can connect to stations wired in standard RJ-45 Ethernet
station mode using straight cables. Transmission devices connected to each
other use crossed cables. The following figure illustrates the pin allocation:
87654321
1 2 3 4 5 6 7 8
Figure RJ-45 connector
The following shows the way to make the cable use to connect switch to
network adapter, and cable use to connect switch to switch/hub/bridge.
Pin signal allocation for RJ-45 connector
Pin
MDI-II
MDI-X
1
TX+ (send)
RX+ (receive)
2
TX- (send)
RX- (receive)
3
RX+ (receive)
TX+ (send)
4
No use
No use
5
No use
No use
6
RX- (receive)
TX- (send)
7
No use
No use
8
No use
No use
Straight cable: use to connect switch (uplink port) or network adapter to switch/
hub/other device (normal port).