3Com 3C16792 User Guide - Page 23
on and operating correctly. Refer to below
UPC - 662705404578
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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-through 10BASE-T cable which is properly connected at both ends, and is not damaged. If the cable is connected to port 8, 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 9 below to compare the wiring of a straight-through and a crossover cable. Figure 9 Straight-through Cable/Crossover Cable Normal port Pin 1 Rx+ 2 Rx- 3 Tx+ 4 5 6 Tx- 7 8 Uplink Normal Pin port port Pin 1 1 Rx- Rx+ 2 2 Rx+ Rx- 3 3 Tx- Tx+ 4 4 5 5 6 6 Tx+ Tx- 7 7 8 8 Normal Pin port 1 Rx+ 2 Rx- 3 Tx+ 4 5 6 Tx- 7 8 23