D-Link DFE-530TX User Manual page 20

DFE-530TX Ethernet/Fast Ethernet Adapter for PCI Bus
The DFE-530TX Adapter features three LED indicators to assist in
the resolving of network diagnostics:
10Mbps/100Mbps SPEED Indicator
This LED shows steady green (on) when 100Mbps speed is
selected. It is dark (off) when 10Mbps is negotiated.
LINK Indicator
Steady green indicates good linkage between the DFE-530TX
and its supporting hub.
ACTIVITY Indicator
Flashing green indicates that the adapter is sending or
receiving.
A-2 Troubleshooting