The object specifies the power limit set for the unit as a whole.
The PoE unit will already have a nominal power defined by the
IETF Power MIB [1] pethMainPsePower object. This OPTIONAL object
specifies a further limit to this nominal power value. This may
be useful to control the thermals of the unit, or for internal
testing purposes. One possible use for this object may be to lower
the power consumption of the unit if one or more of the internal
fans have broken. It is a read/write 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).