Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1993-07-21
1995-07-18
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
342450, H04M 1100, G01S 302
Patent
active
054349044
ABSTRACT:
A mobile terminal position information display system which detects accurate information on a position between a radio controller and a radio telephone and displays the position and locus of movement of the radio telephone. The system includes one or more mobile terminals which make communication by radio to output signals indicative of their positions; one or more mobile terminal control units for transmitting/receiving a signal to/from a mobile terminal, at least one exchange to which a mobile terminal control unit is connected, and an output processor including an analyzer for analyzing the signal indicative of the position of the mobile terminal from the reporting unit to output information on the position of the mobile terminal. The mobile terminal control units each include a detector for detecting a signal indicative of the position of a mobile terminal. Each exchange includes a reporting unit for providing to the output processor a signal indicative of the position of the mobile terminal detected by the detector.
REFERENCES:
patent: 4623966 (1986-11-01), O'Sullivan
patent: 5055851 (1991-10-01), Sheffer
patent: 5191342 (1993-03-01), Alsup et al.
Ishiwata Yasumasa
Tabuchi Yasuhide
Tsuzuki Takuo
Chernoff Michael B.
Hitachi , Ltd.
Hitachi Software Engineering Co. Ltd.
Kuntz Curtis
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