Selective dissemination of information

Details Selective dissemination of information Selective dissemination of information

1988-04-29

1990-05-01

Lev, Robert

Telephonic communications

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

Including fiber optic link within telephone network

379 93, 379110, 34082544, H04Q 700

Patent

active

049225189

ABSTRACT:
A delivery system for the selective dissemination of information to subscribers uses a non-telephone authorizing signal to authorize the subscriber stations for which information is to be delivered. The subscriber station, when authorized, dials up a predetermined number to form a telephone channel through which the information is delivered. The apparatus and method eliminate the need for a dedicated channel serving the station and preferably the subscriber station only seizes a telephone channel when available and therefore may share an existing telephone channel.

REFERENCES:
patent: 4104486 (1978-08-01), Martin et al.
patent: 4677434 (1987-06-01), Fascenda
patent: 4713837 (1987-12-01), Gordon
patent: 4742516 (1988-05-01), Yamaguchi
patent: 4811379 (1989-03-01), Grandfield

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