Ups Power Supply; Figure 3. Uninterruptible Power Supply (Ups) - ADTRAN Total Access 372 Installation And Maintenance Manual

Components and Interfaces

UPS Power Supply

The power feed must be UL Listed ITE SPS having an Limited Power Supply (LPS) Output
rated at 12 VDC, minimum 2 A, and suitable for the intended location. The SBU ONT utilizes
an uninterruptible power supply (UPS). An UPS (see Figure 3) is a battery backup system
designed to continue providing power when the primary power source is lost. When the UPS
senses a loss of power from the primary source, the backup battery is activated to provide
power for a short period of time.
UPS
85V AC-
Power Converter
ONT
264V AC
Battery Charger
12V DC
Alarms
Battery
Alarms
Backup

Figure 3. Uninterruptible Power Supply (UPS)

Power is supplied to the SBU ONT by an UPS local power source with battery backup that
utilizes the AC power at the customer premises. The unit powers the SBU ONT and functions
as a battery backup supplying continuous 12 VDC. It contains one sealed, lead‐acid battery for
power backup.
If the battery is disconnected, the SBU ONT is not protected from power outages, and will
send a "Battery Missing" alarm to the OLT.
Install the UPS per the specifications recommended by the manufacturer.
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