When the Window Unit status light (the one on the top) is flashing green it means that the Window Unit is verifying regulatory compliance. This process normally takes only a few minutes but can take up to 30 minutes..
Wait for light to stop flashing green
To reduce time you can make sure that the Window Unit or coverage has not been placed very close to a 5 GHz cordeless phone or other Wi-Fi device.
If you have placed the Unit in an area where the handset has bars and waited for more than 30 minutes, but the light is still flashing green, please visit: http://cel-fi.com/warranty/exchange