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

Components and Interfaces

UPS Power Supply

The uninterruptible power supply (UPS) provides 12 VDC to the SBU ONT. 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
uses 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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