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BATTERY BACKUP MODE
With the installation of the ADTRAN Power Supply/Battery
Charger (PS/BC) and backup battery pack, the MX2800 is able to
continue operation without service interruption in the event of a
power outage. This PS/BC (part number 4175043L1) provides
-48 VDC to the MX2800. It receives 115 VAC through a standard
plug and wall socket.
The PS/BC maintains the battery at peak charge (-48 V) at all times.
If AC power is lost, the unit automatically transfers power to the
battery without interrupting service. When AC power returns, the
unit switches back to AC power and recharges the battery. For
installation instructions, refer to the guide provided with the PS/
BC. See Figure 8-4 for an illustration of this setup.
The MX2800 can operate on a fully-charged battery for four hours with-
out recharging.
.
-48 VDC
Backup Battery Pack
P/N 1175044L1
61200290L1-1
MX2800
AC/DC Power Supply
Battery Charging Unit
P/N 1175043L1
Battery Charger
Power Cable
MX2800 User Manual
Chapter 8. Power Loss Recovery
Magnified View
PWR
PWR
FAIL
RET
FAIL
Green
Black
White
Battery Backup Cable
Figure 8-4. Battery Backup System
8-5
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