if you experience any problems with the adapter, first: ascertain that the appropriate driver is loaded; that the proper grade of cable is employed for the network connection; and that the supporting hub is properly qualified for the application.

    the dge-550t adapter features four led indicators:

    link/activity steady green indicates good linkage between the dge-550t and its supporting server or switch. flashing green indicates activity (transmitting or receiving) within the adapter.

    fdx steady green indicates the adapter is operating in full-duplex mode.

    1000m the led indicator lights green when a 1000 mbps device is connected to the adapter.

    100m the led indicator lights green when a 100 mbps device is connected to the adapter.