Portable radio telephone with sound off-hook production

Details Portable radio telephone with sound off-hook production Portable radio telephone with sound off-hook production

1997-05-22

1999-07-13

Chin, Wellington

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455563, 455569, 455550, H04Q 720, H04Q 732, H04Q 738

Patent

active

059240466

ABSTRACT:
A portable radio telephone operating under the control of a microprocessor includes a disturbance sensitive switch sensitive to shock, movement or other physical disturbance or to a voice which causes the telephone to go "off-hook" if the telephone is disturbed during an incoming call. The user can thus answer an incoming call very quickly before the system times-out the call by gently striking or simply moving the telephone or talking or shouting to it even when the telephone is in a relatively inaccessible location. In a preferred embodiment the user is required to confirm the off-hook condition by pressing one of the keys on the telephone keypad. The telephone may continue ringing until the confirmatory keystroke has been effected.

REFERENCES:
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patent: 5233644 (1993-08-01), Yamagata
patent: 5335276 (1994-08-01), Thompson
patent: 5657372 (1997-08-01), Ahlberg et al.
Patent Abstracts of Japan, JP62003546, vol. 011171, Jun. 1987.
Patent Abstracts of Japan, JP60229432, vol. 010082, Apr. 1986.

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