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Once the box is connected to the home the connection to Verizon's network is completed across the street.
In the basement the battery backup is installed. The tech says the battery gives you TV and Internet access for about 20 minutes in a power outage. Then the battery concentrates on phone service. Battery life varies, but replacements are standard and purchased at many places.
The battery for the backup. The batteries are standard and can be bought at many retailers.