Patent ID: 9069539
Filing Date: 2015-06-30
Classification: G06F

Abstract:
1. A power sourcing equipment for supplying power to and communicating data with a powered device over a cable, the power sourcing equipment comprising: a power supply for providing power to the powered device; and a control system configured to sense whether the powered device is a first type for receiving power over a first twisted wire pair coupled between the power sourcing equipment and the powered device, the control system configured to sense whether the powered device is a second type for receiving power over second and third twisted wire pairs coupled between the power sourcing equipment and the powered device, the control system configured to connect the power supply to the first twisted wire pair of the cable, if the powered device is the first type, such that a first voltage from the power supply is applied to a first wire of the first twisted wire pair and a second voltage from the power supply is applied to a second wire of the first twisted wire pair, the control system further configured to connect the first voltage to the second twisted wire pair and the second voltage to the third twisted wire pair if the powered device is the second type, wherein the second voltage is different than the first voltage, and wherein the powered device is configured to activate a communication circuit of the powered device via power from the power supply, and wherein the communication circuit is configured to communicate data over the cable.