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Câble LAN direct (PC à HUB)
RJ45
HUB
P1
P1P2
P2
Signal P1 P2 Signal
TX+ 1 <--------> 1 TX+
TX- 2 <--------> 2 TX-
RX+ 3 <--------> 3 RX+
RX- 6 <--------> 6 RX-
Câble LAN bidirectionnel (PC à PC)
RJ45
P1 P2
RJ45
Signal P1 P2 Signal
TX+ 1 <--------> 3 RX+
TX- 2 <--------> 6 RX-
RX+ 3 <--------> 1 TX+
RX- 6 <--------> 2 TX-
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