Data communication apparatus and method capable of discriminating calling stations
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United States of America Patent
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Nov 30, 1993
Issued Date -
N/A
app pub date -
Aug 19, 1992
filing date -
Jun 29, 1988
priority date (Note) -
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Abstract
A data communication apparatus/method discriminates whether a calling station is a data communication terminal or a voice terminal by sampling information on the communication line to obtain frequency data relating to that information, and summons an operator at the destination to let the operator answer when it is discriminated that the calling station is a voice terminal.
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