This object indicates the Power classification of the
Powered Device(PD) connected on the port.
A value of 'class0(1)' indicates that the power
classification of the powered device falls into
class 0 in IEEE specifications.
A value of 'class1(2)' indicates that the power
classification of the powered devices falls into
class 1 in IEEE specifications.
A value of 'class2(3)' indicates that the power
classification of the powered devices falls into
class 2 in IEEE specifications.
A value of 'class3(4)' indicates that the power
classification of the powered devices falls into
class 3 in IEEE specifications.
A value of 'class4(5)' indicates that the power
classification of the powered devices falls into
class 4 in IEEE specifications.