Radio telephone in which an off operation of an operator-activat

Details Radio telephone in which an off operation of an operator-activat Radio telephone in which an off operation of an operator-activat

1989-12-05

1993-05-18

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

455 89, 455343, 455127, 379 61, H04B 138

Patent

active

052128113

ABSTRACT:
A radio telephone apparatus, such as a car telephone, and the method of controlling a radio telephone apparatus, in which the OFF operation of a power source switch caused by an erroneous operation is inhibited when the radio telephone is in a talk mode. In more detail, the ON or OFF state of the power source switch is detected as well as whether or not the apparatus is in the talk mode, so that the switching of a power source line switch to its OFF state by means of the power source switch is inhibited in the talk mode and allowed only in a non-talk mode. Further, an ON/OFF function of a power supply of the apparatus as well as, for example, a muting function which is necessary only in the talk mode and which acts to attenuate a transmission talk voice, are allocated to one of keys in a dial key pad. The ON or OFF state of the allocated function key is detected to perform muting control based on the ON or OFF output of the function key in the talk mode and to perform ON/OFF control of the apparatus power supply in the non-talk mode.

REFERENCES:
patent: 4513446 (1985-04-01), Leslie
patent: 4663765 (1987-05-01), Sutphin et al.
patent: 4726052 (1988-02-01), Kato et al.
patent: 4788720 (1988-11-01), Brennan et al.
patent: 4893348 (1990-02-01), Andoh
patent: 4916729 (1990-04-01), Usui
patent: 4945570 (1990-07-01), Gerson et al.
Dargent, Bob "Aurora System Lights the Way in Cellular Mobile Radio Market"; Telephony, Aug. 16, 1982.
English translation of Japanese Patent No. 55-130244 issued to Sugiyama.

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