Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-06-10
2000-02-29
Bost, Dwayne D.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455550, 455 382, 455 384, 455575, 455349, 455344, 34082544, 34082546, H04B 138, H04B 700, H04B 108, G08B 522
Patent
active
060320583
ABSTRACT:
A cellular mobile telephone apparatus including a main body, and an alarm device which is provided separately from the main body, the main body including: receiving/transmitting unit for receiving and transmitting radio frequency signals between a base station; modulating/demodulating unit for modulating and demodulating between the radio frequency signals, and a conversation signal and a control signal; telephone receiver unit for reproducing audible conversation voice in response to the demodulated conversation signal from the modulating/demodulating unit; telephone transmitting unit for converting conversation voice into the conversation signal; a controller for controlling operation of the main body of the cellular mobile telephone apparatus in accordance with the control signal; and an alarm device for providing an alarm signal which includes an identification information and is transmitted through the radio frequency, when a call is terminated at the main body; and the alarm device including: receiving unit for receiving the alarm signal of radio frequency; a discriminator for discriminating the alarm signal assigned to itself from others by the identification information included therein; and an alarm unit for alarming call termination in response to the identification by the discriminator.
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Higuchi Kazutoshi
Kanomata Yoshihiro
Takahara Yasuaki
Tomihara Hiroyuki
Bost Dwayne D.
Hitachi , Ltd.
Legree Tracy M.
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