Call waiting notifying apparatus
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United States of America Patent
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-
Jan 5, 1999
Issued Date -
N/A
app pub date -
Oct 24, 1997
filing date -
Oct 12, 1990
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A call waiting notifying apparatus including a discriminating circuit to discriminate to see if a call reception has been generated from a digital line to an analog terminal in communication or not; and a transmitting circuit to transmit a predetermined tone to the analog terminal if the generation of the call waiting is determined by the discriminating circuit. The discriminating circuit discriminates the generation of the call waiting on the basis of a command received through a control channel of the digital line.
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