Push button phone capable of sending to the telephone line alpha

Details Push button phone capable of sending to the telephone line alpha Push button phone capable of sending to the telephone line alpha

1988-08-24

1990-04-17

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 97, 379 52, H04M 1106

Patent

active

049187210

ABSTRACT:
A pushbutton telephone is used by a calling party to transmit both upper and lower case alphabetical characters on the telephone lines. Upper and lower case characters are selected for transmission by the caller by pressing combinations of keys, including a special key (#) or (*), of a telephone keypad. The combination of keys successively pressed is detected by a receiving terminal at the station of the called party, and a signal representing a corresponding upper case or lower case letter is decoded by the terminal and displayed.

REFERENCES:
patent: 4426555 (1984-01-01), Underkoffler
patent: 4427848 (1984-01-01), Tsakanikas
patent: 4503288 (1985-05-01), Kessler

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