Data communication apparatus which can use either an analog or a

Details Data communication apparatus which can use either an analog or a Data communication apparatus which can use either an analog or a

1990-10-29

1992-08-25

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

To produce visual-graphic copy

358442, H04M 1100

Patent

active

051425688

ABSTRACT:
A data communication apparatus includes an analog communication unit for performing analog communication, an A/D converter for converting the analog signal from the analog communication unit into a digital voice signal, and an ISDN communication control unit for sending the digital voice signal from the A/D converter onto a digital communication line. Data used in an ISDN are voice data, image data, facsimile communication data, etc.

REFERENCES:
patent: 4058838 (1977-11-01), Cragger et al.
patent: 4532377 (1985-07-01), Zink
patent: 4746986 (1988-05-01), Tanigawa
patent: 4771335 (1988-09-01), Obara
patent: 4774590 (1988-09-01), Haganuma et al.
patent: 4876604 (1989-10-01), Nobuta
patent: 4910610 (1990-03-01), Utsugi
patent: 4970603 (1990-11-01), Kanai
patent: 4974097 (1990-11-01), Kaneko et al.
Summer, Eric E."ISDN-The Telephone of Tomorrow", Radio Electronics, vol. 59, No. 10, Oct. 1988, pp. 41-50.

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