ADTRAN MX2800 M13 - Manual (Page 123)

MX2800 M13 Multiplexer User Manual Power Loss Recovery, Section 8
61200290L1-1G 8-3
Figure 8-3. Power Supply and Source Failure Recovery Mode
5. BATTERY BACKUP MODE
With the installation of the ADTRAN Power Supply/Battery Charger (PS/BC) and backup battery pack,
the MX2800 can continue operation without service interruption in the event of a power outage. This
PS/BC (P/N 4175043L2) 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 VDC) at all times. If AC power is lost, the unit
automatically supplies power from 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 on page 8-4 for an illustration of this setup.
NOTE
The MX2800 can operate on a fully charged battery for 4 hours without
recharging.