Method and apparatus for maintaining availability of lifeline te

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network

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379413, 307 66, H04B 1012, H04M 100, H02J 700

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active

060289163

ABSTRACT:
An apparatus and method of powering a cable telephony service platform (CTSP) in a hybrid fiber coax (HFC) network are provided which utilizes a combination of power from a local AC driven power source having a back-up battery for powering the CTSP within a network interface unit (NIU) during interruptions in normal AC power, and a network generated charging current which maintains the battery at full float voltage charge irrespective of the duration of any such interruptions in AC power delivery. Thus, the present invention minimizes power required to be delivered by the network while still ensuring support of reliable lifeline telephony service for cable telephony on an HFC network.

REFERENCES:
patent: 3959602 (1976-05-01), Jayson
patent: 4984267 (1991-01-01), Martinez
patent: 5355401 (1994-10-01), Skinner, Sr.
patent: 5530748 (1996-06-01), Ohmori
patent: 5664002 (1997-09-01), Skinner, Sr.
patent: 5804890 (1998-09-01), Kakalecv et al.
patent: 5818125 (1998-10-01), Manchester

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