Patent ID: 7294940

Claim:
An apparatus for providing distributed uninterrupted DC power supply to an Ethernet power distribution system incorporating one or more power over Ethernet power sourcing devices, the apparatus comprising: a DC power output port; an AC to DC converter connected to the DC power output port and configured to receive an AC power input and output DC power to the DC power output port; a 48V rechargeable battery pack configured to provide backup DC power to the DC power output port; a DC to DC converter connected to the rechargeable battery pack and configured to regulate a voltage from the rechargeable battery pack to a constant DC voltage; a low voltage disconnect unit connecting the DC to DC converter to the DC power output port, the low voltage disconnect unit is configured to disconnect the battery when the battery voltage reaches a specified level; and a network interface connected to the AC to DC converter, the low voltage disconnect unit, the DC to DC converter, and the power over Ethernet circuitry and configured to monitor and send control signals to the AC to DC converter, the low voltage disconnect unit, the DC to DC converter, and the power over Ethernet circuitry.