The Battery Storage Unit (BSU) can be added to the Small Office, Home Office Optical Network Terminal (ONT) used to provide service to customers who subscribe to three or more voice lines. When the BSU with two fully charged 12-volt batteries is added to such an ONT with an existing battery backup equipped also with fully charged 12-volt batteries, you will have up to 24 hours of backup power for basic voice service, including calls to 911.
Note: Internet and TV service will not be available during a power outage even if a fully charged battery is installed. The BSU only provides backup power for voice service.
Note: All sales are final. You cannot return the Battery Storage Unit.