Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1989-12-19
1992-07-21
Dwyer, James L.051315646
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 59, 379 61, 379 62, 379 64, 455 7, 455 17, 455 311, 455 331, H04M 1100, H04M 900, H04B 336, H04B 714
Patent
active
051330016
ABSTRACT:
A radiotelelphone system in the form of a private branch exchange (12) within and/or outside one or more buildings is equipped with a plurality of mobile subscriber units (28), a plurality of transmitter/receiver units (27) capable of communicating with the subscriber units (28) by radio, and a central unit (26) cooperating with the transmitter/receiver units (27). In order that such a radiotelephone system not only permits mobile telephoning within and/or outside buildings but also can be installed later and adapted to changing requirements in a simple manner, the transmitter/receiver units (27) are arranged and designed to form not only a radio link to at least one of the subscriber units (28) but also, via respective adjacent transmitter/receiver units (27), a radio-link chain (radio bus) to the central unit (26), which has a separate transmitter/receiver unit.
REFERENCES:
patent: 4528656 (1985-07-01), Morais
patent: 4558177 (1985-12-01), Corris et al.
patent: 4675863 (1987-06-01), Paneth et al.
patent: 4718108 (1988-01-01), Davidson et al.
patent: 4790000 (1988-12-01), Kinoshita
patent: 4797947 (1989-01-01), Labedz
patent: 4843622 (1989-06-01), Yotsutani et al.
patent: 4852148 (1989-07-01), Shibata et al.
patent: 4878238 (1989-10-01), Rash et al.
patent: 4881271 (1989-12-01), Yamauchi et al.
patent: 4918746 (1990-04-01), Serizawa
patent: 4972456 (1990-11-01), Kaczmarek et al.
"Controlled Radio Coverage Within Buildings", D. A. Palmer and A. J. Motley, Br. Telecom Technol. J., vol. 4, No. 4, Oct. 1986.
Cumming William D.
Dwyer James L.051315646
Standard Elektrik Lorenz A.G.
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