Communication apparatus for detecting a calling signal from a li

Details Communication apparatus for detecting a calling signal from a li Communication apparatus for detecting a calling signal from a li

1997-11-21

2000-07-18

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

37910015, 358400, H04M 1100

Patent

active

RE0367834

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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