Single line communication apparatus for speech and data and method therefor
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United States of America Patent
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Apr 13, 1993
Issued Date -
N/A
app pub date -
Jul 20, 1992
filing date -
Jul 1, 1988
priority date (Note) -
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status (Latency Note)
Importance
Abstract
In a single line communication apparatus for both telephone and data (e.g., facsimile), the communication line is switched from a telephone to a data communication unit when an incoming data call is received in response to an indication for data communication from the telephone. The communication line is monitored to detect the occurrence of a non-aural terminal calling tone (CNG) within a predetermined time period. Upon detection of the CNG tone within the predetermined time period, a non-aural called party discrimination signal (CED) is transmitted to indicate the start of a data communication.
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