D-Link DGS-1016D Manual page 17

LED Indicator
Power
Link/Act
100Mbps/1000Mbps
Cable Diagnostics
(during boot up only)
Description
This lights green while the Switch is
receiving power.
A steady green light indicates the
corresponding port is connected and a valid
link is established. This will blink green
when there is activity on the port.
The speed indicator will light green if the
corresponding port is connected and
operating at 1000Mbps. An amber light
indicates the port is operating at 100Mbps.
If the port is connected (as indicated by the
Link/Act indicator) and the speed indicator
does not light, the port is operating at
10Mbps.
Open or short circuit  100/1000Mbps LED
light amber