3Com 8 manual Straight-through Cable/Crossover Cable, RxD+

Port Status LED not lit for a 10BASE-T port that has a connection. There is a problem with this connection. Check that you are using a straight-through10BASE-T cable which is properly connected at both ends, and is not damaged. If the cable is connected to port 4, ensure that the Uplink/Normal switch is set to Normal (out). Also check that the equipment being connected to the hub is powered on and operating correctly. Refer to Figure 6 below to compare the wiring of a straight-through and a crossover cable.

Figure 6 Straight-through Cable/Crossover Cable

Straight-through

TxD+ 1 1 TxD+

TxD- 2 2 TxD-

RxD+ 3 3 RxD+

RxD- 6 6 RxD-

Pins 4, 5, 7 and 8 are not used

		Crossover
TxD+	1	1	TxD+
TxD-	2	2	TxD-
RxD+	3	3	RxD+
RxD-	6	6	RxD-

Pins 4, 5, 7 and 8 are not used

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