Selective call waiting
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United States of America Patent
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Feb 13, 1996
Grant Date -
N/A
app pub date -
Jun 30, 1995
filing date -
Jun 30, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A selective call-waiting system for telephony use samples transmission on a busy line if the line subscribes to the selective call-waiting service, and avoids interrupting the transmission with a call-waiting signal if the transmission is data-type. If the transmission on the busy line subscribing to the selective call-waiting service is voice-type, the system sends a call-waiting signal. Signal analyzers are disclosed, as well as methods for practicing the invention.
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