Interruption of a call between two terminals by a call from another terminal
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United States of America Patent
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Jul 27, 1999
Grant Date -
N/A
app pub date -
Jul 22, 1997
filing date -
Jan 27, 1995
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A method of interrupting a call established via an analog link between two terminals via a switching center, whether the call is telephonic, telematic or a combination of the two, comprises the transmission of a user alerting signal and a terminal alerting signal from the switching center to one of the terminals. Between these signals the call between the terminals is re-established. To detect the terminal alerting signal the terminal searches during a predetermined period for a pattern transmitted by the switching center comprising in succession a first silence signal with a power less than a predetermined power during a first predetermined period of silence, the terminal alerting signal, and a second silence signal during a second predetermined period of silence.
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