Patent ID: 7230522
Filing Date: 2007-06-12
Classification: H02J,Y02B,Y02E,Y04S

Abstract:
1. A data communication system comprising: a source of alternating current and voltage; a means for converting said source of alternating current and voltage to direct current and voltage, said means for converting said source of alternating current and voltage to direct current and voltage connected to said source of alternating current and voltage; one or more powered devices that are responsive to changing their mode of operation depending on whether or not they are supplied with alternating current and voltage or direct current and voltage while still being able to draw operational power from either source of alternating current and voltage or direct current and voltage; and a first switching means that alternately connects said one or more powered devices to either the said source of alternating current and voltage or the output of said means for converting said source of alternating current and voltage to direct current and voltage.