Telephone with unified features for hearing and deaf users

Details Telephone with unified features for hearing and deaf users Telephone with unified features for hearing and deaf users

1994-06-10

1997-02-18

Chan, Jason

Telephonic communications

Including aid for handicapped user

379 96, H04M 1100

Patent

active

056047860

ABSTRACT:
A unified TDD and telephone incorporate intelligent mode switching to permit users of either device to use the integrated unit with the other features remaining largely invisible by sensing various signals including the removal of the handset or the turning on and off of the TDD device to determine the likely mode of a transmission and the detection of text to determining the likely mode of the receive text. This intelligent mode conversion includes a voice carryover mode in which text and voice may both be transmitted.

REFERENCES:
patent: 4503288 (1985-03-01), Kessler
patent: 4839919 (1989-06-01), Borges et al.
patent: 4959847 (1990-09-01), Engelke et al.
patent: 5081673 (1992-01-01), Engelke et al.
patent: 5086453 (1992-02-01), Senoo et al.
patent: 5121421 (1992-06-01), Alheim
patent: 5325417 (1994-06-01), Engelke et al.
patent: 5327479 (1994-07-01), Engelke et al.

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