If you have a New Livebox, Orange includes an Airbox 4G that connects to it via USB with your Internet subscription. This allows you to connect via a 4G mobile network (or a 3G network if you are temporarily in a zone not served by 4G), and so have Internet access even before your fiber optic or ADSL connection is operational.
Later, if you are away from home, or if your ADSL or fiber optic connection is down, you can continue to have Internet access via your Airbox: you no longer need fear the loss of a network connection!
http://orange.com