Portable telephone with power source/mode change during calls

Details Portable telephone with power source/mode change during calls Portable telephone with power source/mode change during calls

1990-12-27

1991-07-30

Eisenzopf, Reinhard J.

Telephonic communications

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

Including fiber optic link within telephone network

455127, 455 89, H04M 1100, H04B 700

Patent

active

050365320

ABSTRACT:
A unique cellular portable telephone (100) automatically accommodates a power source change during a cellular telephone call between the portable's battery (300) and another battery or an external power source from vehicular adaptor (200), such as, for example, a battery eliminator adaptor, a hands-free adaptor, or a mobile transceiver adaptor. The operating mode of portable telephone (100) also automatically changes when it is coupled to or decoupled from vehicular adaptor (200) during a cellular telephone call. For example, when vehicular adaptor (200) is plugged into portable telephone (100), the portable display (116) is not disabled when inactive for a predetermined time.

REFERENCES:
patent: 4627107 (1986-12-01), Hohlfeld et al.
patent: 4680787 (1987-07-01), Marry
patent: 4684870 (1987-08-01), George et al.
patent: 4852147 (1989-07-01), Suzuki et al.

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