Method and apparatus for monitoring local telephony service power on a hybrid fiber-coax network
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United States of America Patent
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May 21, 2002
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N/A
app pub date -
Dec 20, 1999
filing date -
Dec 31, 1997
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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.
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