Communication controlling apparatus for a single-line telephone with extensions thereto
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United States of America Patent
Stats
-
Oct 15, 1996
Grant Date -
N/A
app pub date -
Apr 21, 1995
filing date -
Apr 21, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a single-line telephone, there are a plurality of extension telephone sets connected by a telephone line and each extension telephone set is connected to a communication controlling apparatus. The communication controlling apparatus includes an alternating current coupler and a power supply thus allowing two extension telephone sets to communicate with each other without being disturbed by a busy tone.
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Family
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Cited Art Landscape
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