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Compaq GS160 User Manual

Page 143

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Using the System Control Manager

8-3

The SCM communicates with the PCI backplane managers (PBMs), the
hierarchical switch power manager (HPM), and the QBB power system
managers (PSMs) distributed throughout the CSB subsystem. The subsystem
has a power source separate from the rest of the system called auxiliary voltage
(Vaux). Vaux enables the subsystem to be turned on from a remote site when
the main system breaker is on and the system is plugged in.

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