Dual keypad telephone handset for mobile communications

Details Dual keypad telephone handset for mobile communications Dual keypad telephone handset for mobile communications

1994-12-19

1997-03-11

Kuntz, Curtis

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379428, 379433, 455 90, H04M 1100

Patent

active

056109717

ABSTRACT:
A telephone for mobile application affords hands-free operation when the handset is seated in a cradle and hand-held operation when removed from the cradle. The two modes are automatically sensed by a reed switch in the handset operated by a magnet in the cradle. The back of the handset, which is accessible when in the cradle, contains a back keypad and a back display, and the front of the handset contains a front keypad and a front display along with a microphone and an earpiece. When the reed switch senses hands-free mode only the back keypad and display are enabled, along with an external speaker and microphone. When hand-held mode is sensed, the front keypad, display and audio functions are enabled.

REFERENCES:
patent: 3792205 (1974-02-01), O'Dea
patent: 4646344 (1987-02-01), Goldhorn et al.
patent: 5151946 (1992-09-01), Martensson
patent: 5173936 (1992-12-01), Ditzig
Best Two-Line Cordless Telephone, TWA Sky Mall Catalog, Early Spring 1995.

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