ADTRAN MX2800 M13 - Manual (Page 122)

8-2 61200290L1-1G
Section 8, Power Loss Recovery MX2800 M13 Multiplexer User Manual
NOTE
Power supplies are hot-swappable.
3. POWER SUPPLY RECOVERY MODE
In Power Supply Recovery Mode, two power supply cards are installed and connected to a single power
source. See
Figure 8-2 . In this mode, the MX2800 continues operation in the event of a power supply
failure without interrupting service. The power supplies are load sharing, so either power supply can
provide power for the entire unit.
NOTE
When the unit is configured with dual internal AC power supplies, this is
the only power supply protection mode available.
Figure 8-2. Power Supply Failure Recovery Mode
4. POWER SUPPLY AND SOURCE RECOVERY MODE
In this mode, two power supply cards are installed and are connected to two individual power sources. The
MX2800 handles any combination of power source or power supply failure.
Much like the backup design for the controller cards, the MX2800 is able to internally re-route the power
source if a power supply card and the opposite power source fail. For example, in
Figure 8-3 on page 8-3,
failed Power Source A is connected to healthy Card A , and healthy Power Source B is connected to failed
Card B. In a case like this, the MX2800 automatically connects Power Source B to Card A.
NOTE
This configuration is available only with DC power supplies.
MX2800