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1
PRODUCT INTRODUCTION
1.1
GENERAL DESCRIPTION
The OPSU/BBU (ONT Power Supply Unit/Battery Back-Up Unit) is designed to be mounted
inside a customer premise. The OPSU/BBU converts 120Vac to 12Vdc and provides four to
eight hours of backup battery power for lifeline POTS and Ethernet services in the ONT.
Alarm outputs are available on the OPSU/BBU to monitor the status of the backup battery
(On/Low/Faulty/Missing). The OPSU/BBU indicates its status to the resident with LEDs and
audible alarms and to the outdoor ONT by a signal return connection.
1.2
Components
The OPSU/BBU consists of a dedicated 120Vac to 48Vdcpower supply (OPSU), a Battery
Backup Unit (BBU) and dedicated support cables.
The user interface for the dedicated power supply consists of a single LED to indicate correct
DC output.
The BBU houses a dedicated battery charger to maintain a 12Vdc, 7.2AH lead-acid sealed
battery, battery monitoring and alarm circuitry. It contains four indicator LEDs to provide
operational status at a glance, status audible alarms, and two customer-operation buttons, one
to silence the audible alarm for 24 hours and the second to cause the unit to re-start when a
new battery is installed.
Figure 1: OPSU/BBU Power Supply and ONT System Configuration
2
IMPORTANT SAFETY NOTES
ONLY qualified installation and repair personnel should service this power supply.
OPSU/BBU Instalation and Operation Manual (IOM), Rev 0.0
Page: 3 of 8
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