Describes the operational status of the port PD detection.
A value of disabled(1)- indicates that the PSE State diagram
is in the state DISABLED.
A value of deliveringPower(3) - indicates that the PSE State
diagram is in the state POWER_ON for a duration greater than
tlim max.
A value of fault(4) - indicates that the PSE State diagram is
in the state TEST_ERROR.
A value of test(5) - indicates that the PSE State diagram is
in the state TEST_MODE.
A value of otherFault(6) - indicates that the PSE State
diagram is in the state IDLE due to the variable
error_conditions.
A value of searching(2)- indicates the PSE State diagram is
in a state other than those listed above.
A value of requestingPower(7) - indicates the PSE State diagram
is in the state IDLE after transitioning from the state
POWER_DENIED due to insufficient PSE power being available to
satisfy the PD's requirements.