Mobile telephone device with low power consumption

Details Mobile telephone device with low power consumption Mobile telephone device with low power consumption

1989-07-06

1991-10-01

Eisenzopf, Reinhard J.

Telephonic communications

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

Including fiber optic link within telephone network

379 58, 379142, 455343, H04M 1100

Patent

active

050540521

ABSTRACT:
A mobile telephone device comprises a separate paging signal channel in addition to the conventional transceiver channels which process voice signals. The paging signal channel has a lower power consumption level than the transceiver channels. A power supply control device shuts off power to the conventional transceiver channels when in a standby mode, i.e. when waiting for an incoming call, and applies power to the paging signal channel instead. Therefore, power consumption is reduced in the standby mode and consequently, the operating time of the battery is extended. Power is applied to the transceiver channels during voice communication periods. A calling party's telephone number received in the paging signal channel is stored and displayed. A control unit has the capability of immediately returning the calling party's call from the telephone number so stored and displayed.

REFERENCES:
patent: 4720710 (1988-01-01), Akahori et al.
patent: 4723304 (1988-02-01), Maeda
patent: 4731814 (1988-03-01), Becker et al.
patent: 4768220 (1988-08-01), Yoshihara et al.
patent: 4794649 (1988-12-01), Fujiwara

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