Battery backup units for Digital Home Phone

CenturyLink offers two different 24-hour battery backup units (BBU) for non-line-powered voice services. Please contact us to order one.

Please be aware that electrical power is required for non-line-powered voice services (including Digital Home Phone) to work. If there is a power outage, the services will not process calls, including those to Emergency 911.

A BBU will improve the ability of these voice services to function during a power outage event. With active good batteries, the BBU will provide temporary backup power for the network equipment and devices in your home that are necessary to provide basic voice services as well as access to dial Emergency 911. (The BBU may not guarantee functionality in the event of a power outage depending on the nature of the outage or if the service network is out of operation.) As a separate service, you may purchase any necessary BBUs, including the housing, from CenturyLink, or you may purchase a backup battery solution from another supplier and install it yourself.

When you talk to a CenturyLink Service Representative, you can discuss the type of service you have and what battery or batteries you may need.

Important information about BBU

In case of an electrical power outage, the CenturyLink BBU should last at least 24 hours in standby mode. While under BBU power, you may not be able to access the Internet. Other services, such as security alarms, may not work.

You are responsible for obtaining, monitoring, replacing and properly disposing of all batteries for the BBU. We recommend that you check the BBU at least twice a year to ensure it is operating and ready to use in case of a power outage.

IMPORTANT: Failure to maintain your BBU may result in loss of voice service during a power outage, including a loss of access to Emergency 911 and other services.

If you purchased the BBU from CenturyLink, our warranty covers the replacement of the battery in the event it stops working within the first year.


More information regarding these units is available on the Precision Power Solutions site.


See batteries labeled:  PP36PB-GRST-2-24D and PP36PB-12BBU-2-24D


For technical assistance or warranty information, contact Precision Power at:
Phone: 615-436-0080

The battery backup units use D size, 1.5 volt, alkaline batteries.

Please note that the BBU is not covered by our Inside Wire Protection plan.

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