Information transmission/reception system using pushphone and in

Details Information transmission/reception system using pushphone and in Information transmission/reception system using pushphone and in

1984-10-04

1987-04-14

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379100, 379105, H04M 1100

Patent

active

046584170

ABSTRACT:
Letters and a space are assigned to numeric keys of a pushphone. A desired numeral, letter or space is transmitted by depressing a corresponding numeric key a predetermined number of times, and thereafter a specific symbol key is depressed. At a reception side, a transmitted letter is detected in accordance with the corresponding numeric key code and the data representing the number of times of depression of the corresponding numeric key. An alphanumeric character string is thus displayed.

REFERENCES:
patent: 3675513 (1972-07-01), Flanagan et al.
patent: 4051326 (1977-09-01), Badagnani et al.
patent: 4095050 (1978-06-01), Beachem et al.
patent: 4191854 (1980-03-01), Coles
patent: 4307266 (1981-12-01), Messina
patent: 4345113 (1982-08-01), Shelley
patent: 4427848 (1984-01-01), Tsakanikas
patent: 4540851 (1985-09-01), Hashimoto
patent: 4546213 (1985-10-01), Dick
patent: 4584434 (1986-04-01), Hashimoto
Sederholm et al., "Intelligent Telephone", IBM Technical Disclosure Bulletin, vol. 23, No. 9, Feb. 1981, pp. 4006-4008.
Pavlak et al., "KEYPAC-A Telephone Aid for the Deaf", IEEE Transactions on Communications, vol. Com-27, No. 9, Sep. 1979.

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