Data communication apparatus

Details Data communication apparatus Data communication apparatus

1991-08-09

1994-02-15

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

To produce visual-graphic copy

358438, 358434, 358435, 358436, H04M 1100

Patent

active

052874028

ABSTRACT:
There is disclosed a facsimile apparatus which transmits a predetermined signal, such as CNG signal, during pause periods succeeding the transmission of telephone number signals. This operation prevents the delay of CNG signal detection in case the receiving side has an automatic telephone/facsimile switching function, and also prevents the facsimile communication being erroneously cut off in case the pause period of the calling side eventually overlaps with the CNG detection period of the receiving side.

REFERENCES:
patent: 4571463 (1986-02-01), Shefler
patent: 4772955 (1988-09-01), Kurahayashi et al.
patent: 4773080 (1988-09-01), Nakajima et al.
patent: 4800439 (1989-01-01), Yoshino
patent: 4908851 (1990-03-01), Kotani et al.
patent: 4910610 (1990-03-01), Utsugi
patent: 4956860 (1990-09-01), Murata
patent: 5127047 (1992-06-01), Bell et al.
Pat. Abs. Jp. vol. 12, No. 469, Dec. 8, 1988 (JP63-189046).

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