Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of repeater
Patent
1996-08-14
1998-07-07
Kuntz, Curtis A.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of repeater
379 26, 370243, 370246, 375213, 375228, H04M 124, H04M 308, H04M 322
Patent
active
057780480
ABSTRACT:
A feed imbalance detector in a repeated line for detecting a feed imbalance in a PCM repeated line and for displaying an alarm includes: a constant current feeder for transmitting an operating voltage to the repeated line; a virtual ground unit for detecting the voltage difference between a plus output port and a minus output port of the constant current feeder; a comparator for comparing the voltage difference with a ground voltage, a detector for determining feed imbalance based on the output level value of the comparator after a predetermined detection time and for outputting a driving signal if feed imbalance is detected, and a display for displaying an alarm upon receiving the driving signal.
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Bushnell Esq. Robert E.
Kuntz Curtis A.
Samsung Electronics Co,. Ltd.
Tieu Binh K.
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