Communication system using movable radio terminals

Details Communication system using movable radio terminals Communication system using movable radio terminals

1991-03-15

1994-07-26

Chin, Stephen

Telephonic communications

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

Including fiber optic link within telephone network

379 63, 379144, 379155, 455 331, H04M 1100, H04Q 700

Patent

active

053331745

ABSTRACT:
A system according to the present invention comprises a telephone switchboard 20 and first coupling distributors 17-19, which are arranged in a central telephone exchange 13, second coupling distributors 10-12 arranged in areas provided with public telephones 1-3, and connected to the first coupling distributors through transmission path 14-16, movable radio terminals 21-26, and base stations 4-6, connected to the second coupling distributors, for relaying radio signals between the radio terminals and the central station. The transmission path 14-16 are used for transmitting signals between the base stations and the central station, as well as between the public telephones and the telephone switchboard.

REFERENCES:
patent: 4300161 (1981-11-01), Haskell
patent: 4593318 (1986-06-01), Eng et al.
patent: 4748655 (1988-05-01), Thrower et al.
patent: 4777646 (1988-10-01), Harris
patent: 4798655 (1988-05-01), Thrower et al.
patent: 4829561 (1989-05-01), Matheny
patent: 4856046 (1989-08-01), Streck et al.
patent: 4879740 (1989-11-01), Nagashima et al.
patent: 4955050 (1990-09-01), Yamauchi
patent: 5020094 (1991-05-01), Rash et al.
patent: 5040205 (1991-08-01), Kunihiro
Patent Abstracts of Japan, vol. 13, No. 503(E-844), Nov. 13, 1989, & JP-A200836, Feb. 5, 1988, S. Kojima, "Private Branch Radio Telephone System".

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