Description: The current slot power class. For a slot containing

an ONcore module, this object's value ranges from 1 to

10, where 1 is the lowest power class and 10 is the

highest power class. Slots assigned higher power classes

will be power-enabled before slots assigned lower power

classes. Similarly, slots assigned lower power classes

will be power-disabled before slots assigned higher power

classes. For a slot containing an ONline module, this

object's value is reported as not-applicable(11) because

ONline modules are not power-manageable (once an ONline

module is inserted into the hub, it will consume power

for as long as it remains in the hub). The value

not-applicable(11) is invalid for a slot containing an

ONcore module. Power class can be used to establish an

ONcore module power-up and power-down priority scheme.

Combined with slot location, slot power class defines the

order in which slots containing ONcore modules will be

power-enabled and power-disabled. For a given power class,

slots are power-enabled from lowest payload slot to highest

payload slot and power-disabled from highest payload slot

to lowest payload slot. Slot power class is not pre-emptive;

changing a slot's power class will not affect the power

state of other slots. It will take effect during a slot

power-up or power-down event (e.g., the failure or recovery

of a power supply).