Lamp Indication:
Power : Power LED will glow as soon as you switch on the modem.
DSL: DSL LED will blink first and then settle permanently in yellow, if the connectivity between the modem and the exchange broadband equipment is perfect and established.
Internet: Internet LED will glow when you are connected to the internet.
WLAN: WLAN LED will glow if wireless is enabled in your modem.
If the connectivity between your modem and computer is OK, two LEDs on either side of the LAN socket will glow in the back panel of your modem.