Automatic electronic disconnector for subscriber terminal equipment
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United States of America Patent
Stats
-
Apr 24, 1984
Grant Date -
N/A
app pub date -
Aug 23, 1982
filing date -
Aug 23, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic circuit means for automatically disconnecting an off-hook subscriber's first telephonic signal sending and receiving terminal device which is in an off-hook mode when a second terminal device is taken off-hook. The disconnector circuit means has voltage sensing means, current sensing means and line disconnecting means. The voltage sensing means senses a voltage across the current sensing means and when at a pre-determined level turns the current sensing means on allowing current to flow through the first terminal device. When the second terminal device is taken off-hook, the voltage across the loop circuit drops and current flow through the current sensing means drops. When the current drops to a pre-determined value, the current sensing means actuates the line disconnecting means and shuts off the current flow through the first terminal device.
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Family
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Cited Art Landscape
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