Data transmission processing machine

Details Data transmission processing machine Data transmission processing machine

1989-09-19

1991-01-22

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 93, 379 97, 379442, H04M 1100

Patent

active

049875884

ABSTRACT:
A data transmission processing machine interposed between a host computer and a telephone line comprises a telephone circuit, a modem, a keyboard, and a mode selection switch. Responsive to a mode selected by the mode selection switch, the keyboard is operated either as a dial for the telephone or as a data entry keyboard for the modem.

REFERENCES:
patent: 3932709 (1976-01-01), Hoff et al.
patent: 4291198 (1981-09-01), Anderson et al.
patent: 4436956 (1984-03-01), Schreiber
patent: 4503288 (1985-03-01), Kessler
patent: 4524244 (1985-06-01), Faggin et al.
American Telephone & Telegraph, Comp., Technical Reference, "Data Set 202E," Mar. 1968.
Racal-Vadic, Advertisement "The Invisible Modem is Here", Telecommunications, Jan. 1981, p. 23.
Computer & Electronics, Oct. 1984, p. 104, New Products, "Telephone/Modem".

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