Subscriber circuit provided with a circuit for monitoring a subscriber instrument
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United States of America Patent
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-
Oct 22, 1996
Grant Date -
N/A
app pub date -
Jun 15, 1994
filing date -
Jun 15, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A subscriber circuit comprising a monitor circuit operating with a power supply voltage supplied to a subscriber instrument and monitoring an operation of the subscriber instrument for generating a monitor signal indicative of the result of monitor, and a power supply voltage abnormality detecting circuit receiving the power supply voltage supplied to the subscriber instrument, for generating an active abnormality detection signal when the power supply voltage deviates from a predetermined voltage range. In response to the active abnormality detection signal, the monitor circuit is inhibited from outputting the monitor signal
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