Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1992-02-03
1993-02-09
Dwyer, James L.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
358400, 379 97, H04M 1100
Patent
active
051857839
ABSTRACT:
A communication apparatus includes a first detector for detecting a calling signal from a line, a tone generator for generating quasi-calling tone and sending it out to the line, a second detector for detecting a signal indicating the data communication from a calling station, and a control unit for starting the data communication in response to the detection by the second detector. The second detector detects the signal while the tone generator sends out the quasi-calling tone when the calling signal is received.
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Nishii Teruyuki
Takahashi Taketo
Ueno Yasuhide
Watanabe Tsunehiro
Canon Kabushiki Kaisha
Chan Wing F.
Dwyer James L.
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