A power over Ethernet controller supporting a plurality of powering modes, the power over Ethernet controller comprising: a pair of power sourcing equipments; and a control circuit; the control circuit being operative to control each of the pair of power sourcing equipment units in one of a first mode...http://www.google.de/patents/US20070021094?utm_source=gb-gplus-sharePatent US20070021094 - POWER OVER ETHERNET CONTROLLER SUITABLE FOR MULTIPLE MODES
