Device for the transmission of data by telephone line

Details Device for the transmission of data by telephone line Device for the transmission of data by telephone line

1992-04-28

1994-10-04

Kuntz, Curtis

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379 96, 379100, H04M 1100

Patent

active

053533372

ABSTRACT:
A system for the transmission and reception of data by telephone line, the system making use of the idle time on the telephone line, which connects the switching system of a telephone exchange with the telephone in a user's home, to transmit signals by way of the telephone line from a center independent of the telephone exchange to the user's home. The center includes a data base for storing a plurality of items of compound data, each item consisting of a specified number of interrelated data groups, and a transmission unit which accesses the database, reads data groups in order from an item of compound data, converts the resultant digital signals to analog form and outputs the analog signals to the telephone line. The user's home includes a receiver, which converts analog signals received from the telephone line to digital form, and when the specified number of data groups have all been input, outputs each of the data groups simultaneously, and a specified number of terminals which operate in accordance with the data groups received from the receiver.

REFERENCES:
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patent: 4538176 (1985-08-01), Nakajim et al.
patent: 4943963 (1990-07-01), Waechter et al.
patent: 5130792 (1992-07-01), Tindell et al.
patent: 5132992 (1992-07-01), Yurt et al.
patent: 5153917 (1992-10-01), Kato
Frequenz, vol. 36, No. 435 (E-1263) Sep. 10, 1992 & JP A-41-51-957 (Rikosu) May 25, 1992 Abstract.
Review of the Electrical Communication Laboratories, vol. 33, No. 2, Mar. 1985, pp. 277-283, Y. Kobayashi et al. Videotex Terminals.
European Search Report, EP 92 11 2268.

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