Adtran MX2800 M13 User Manual

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61200290L1-1G

Section 8, Power Loss Recovery

MX2800 M13 Multiplexer User Manual

Power supplies are hot-swappable.

In Power Supply Recovery Mode, two power supply cards are installed and connected to a single power 
source. See 

. 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.

 

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 

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.

This configuration is available only with DC power supplies.