Power Supply Recovery Mode; Power Supply And Source Recovery Mode; Figure 8-2. Power Supply Failure Recovery Mode - ADTRAN MX2800 M13 User Manual

Section 8, Power Loss Recovery
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.
When the unit is configured with dual internal AC power supplies, this is
the only power supply protection mode available.
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
failed Power Source A is connected to healthy Card A
Card B. In a case like this, the MX2800 automatically connects Power Source B to Card A.
This configuration is available only with DC power supplies.
8-2
NOTE
NOTE
MX2800

Figure 8-2. Power Supply Failure Recovery Mode

NOTE
MX2800 M13 Multiplexer User Manual
and healthy Power Source B is connected to failed
,
Figure 8-3 on page 8-3,
61200290L1-1G