What does the flashing green LED mean?

The flashing green LED indicates that the device is in operation.
If the LED flashes every 2 seconds, the device is trying to connect to the network.
If the device is connected to a wired network, the LED flashes 1-2 times per second.
If the LED flashes 2-3 times per second, it indicates that the device is connected to a wireless network (WLAN, WiFi).