H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 11/00 (2006.01) H04N 1/00 (2006.01) H04N 1/327 (2006.01)
Patent
CA 2068611
Disclosed a facsimile apparatus that combines copying with transmission. An external telephone is connected to it to be remotely controlled by a remote signal including at least one DTMF signal from the external telephone. And, there is pro- vided means for comparing the tone duration of the tone-pair signal having DTMF frequencies sent by the external telephone with a predetermined detec- tion time, and deciding whether or not said tone- pair signal is a valid DTMF signal used for remote signals based on the compared result. Further, there is provided means for estimating the tone duration of DTMF signals that is specific to the external telephone, and setting the optimum detec- tion time.
Hayashi Motohiko
Kotani Matahira
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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