Data communication apparatus having the function of automatically switching data communication and telephone communication
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United States of America Patent
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Jun 27, 1995
Grant Date -
N/A
app pub date -
Dec 6, 1993
filing date -
Dec 22, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A facsimile apparatus sends a quasi-ring back tone to a destination in response to a call from the destination, and detects a CNG from the destination while the apparatus is periodically sending the quasi-ring back tone to the destination. When the apparatus detects a CNG for the first time, the apparatus stops sending the quasi-ring back tone and then performs facsimile communication in response to a second detection of a CNG from the destination, so as to certainly detect the CNG and to quickly shift to facsimile communication.
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