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What is BBU? BBU- Battery Backup Unit is installed inside your house or garage. Unlike your old phone equipment, the new Fiber equipment relies on commercial power at your house. That means if you loose power in the house, you will loose all Fiber services. The Fios folks came up with a BBU unit which will provide power to your phone in the event of a power outage. This will provide up to 8 hours of power to your Voice service only! See BBU Pictures in General Fios FAQ under What is..
BPON (Broadband PON) is a standard based on APON. It adds support for WDM, dynamic and higher upstream bandwidth allocation, and survivability. It also created a standard management interface, called OMCI, between the OLT and ONU/ONT, enabling mixed-vendor networks.