The object specifies the amount of power remaining in the guaranteed
power pool. Each time a port is placed into guaranteed mode it
reserves a set amount of power out of the total guaranteed power
pool for the system. This intention of this object is to give the
client of this MIB (whether that be the CLI or the Web interface or
the end user) an indication of how many ports can still be placed
into guaranteed mode. It is a read only integer value with units of
Watts(note - Watts is chosen instead of milliWatts here since the
IETF Power MIB [1] measures unit based parameters,such as the
pethMainPsePower object, in units of Watts).