1. A method of classification of power requirements in a power over Ethernet system, said method comprising: providing a first classification voltage for a first classification cycle time, said provided first classification voltage being within a classification voltage range defined by a lower classification voltage limit and upper classification voltage limit; measuring a first current flow responsive to said provided first classification voltage; subsequent to said first classification cycle time, providing a voltage outside of said classification voltage range for a classification indexing time; subsequent to said classification indexing time, providing a second classification voltage for a second classification cycle time, said provided second classification voltage being within said classification voltage range; measuring a second current flow responsive to said provided second classification voltage; determining a classification responsive to said measured first current flow and said measured second current flow.