System for providing telephony and data services
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United States of America Patent
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Apr 7, 2015
Grant Date -
Sep 26, 2013
app pub date -
Nov 23, 2011
filing date -
Nov 23, 2010
priority date (Note) -
In Force
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Abstract
A telephone on-hook/off-hook state communication system. The system includes a first part, for example in the form of an In-Line Analog POTS presentation Adapter, which is operable to interconnect between a telephone apparatus and a pair of conductors, and a second part operable to interconnect between the pair of conductors and a telephone adapter unit, the first part including a variable impedance and means for changing the impedance of the variable impedance such that a property of the impedance at a predetermined frequency (f) greater than zero changes in response to the telephone apparatus transitioning between an on-hook state and an off-hook state, the second part including a detector for detecting the change in the impedance of the variable impedance of the first part via the pair of conductors.
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