Power conserving mobile telephone usable as a portable phone and

Details Power conserving mobile telephone usable as a portable phone and Power conserving mobile telephone usable as a portable phone and

1992-02-05

1994-10-04

Chin, Stephen

Telephonic communications

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

Including fiber optic link within telephone network

379 59, 379 67, 455 111, 455 134, 455 88, H04M 1100, H04M 164, H04B 715, H04B 140

Patent

active

053533305

ABSTRACT:
A mobile telephone usable both as a portable and as an installed telephone, capable of saving battery power when used as a portable telephone, and safely starting up voice-dialing when used as an installed telephone. Discriminating circuit (3, 3A, 14) discriminates which use the telephone is now in, portable or installed. In the former use, start-up circuit (7, 15) is manually activated to supply power from battery pack (1) to voice-dialing unit (8). The power supply is cut off in response to reset signal R supplied from the voice-dialing unit when voice-dialing ends. In the latter use, voice-dialing unit is kept switched on to the vehicle battery and ready for start-up in response to voice input.

REFERENCES:
patent: 4908846 (1990-03-01), Maru
patent: 4916729 (1990-04-01), Usui
patent: 4961212 (1990-10-01), Marui et al.
patent: 4962523 (1990-10-01), Tanaka
patent: 4974250 (1990-11-01), Tomiyori
patent: 5036532 (1991-07-01), Metroka et al.
patent: 5042063 (1991-08-01), Sakanishi et al.
patent: 5054115 (1991-10-01), Sawa et al.
patent: 5148471 (1992-09-01), Metroka et al.

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