Power supply, and apparatus and method for operating a power...

Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source

Reexamination Certificate

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C324S426000

Reexamination Certificate

active

07061140

ABSTRACT:
A power supply is configured to accept battery and external power sources, and is adapted for use in equipment in a broadband communications network. A first voltage detector detects a first voltage signal at an electrical path associated with the battery power source and a second voltage detector detects a second voltage signal at an electrical path associated with the external power source. A processor is responsive to the first and second voltage detectors and adapted to generate an electrical signal indicating whether the battery power source is present, charged and being used. A light emitting diode, responsive to the processor, displays, in an order of priority, whether the battery power source is present, charged or being used.

REFERENCES:
patent: 5119011 (1992-06-01), Lambert
patent: 5477150 (1995-12-01), Ham et al.
patent: 5825100 (1998-10-01), Kim
patent: 6392383 (2002-05-01), Takimoto et al.
patent: 6803678 (2004-10-01), Gottlieb et al.
PacketCable Embedded MTA Primary Line Support Specification, PKT-SP-EMTA-PRIMARY-101-001128, Cable Television Laboratories, Inc., 2000, 38 pages.

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