Data transmission system

Details Data transmission system Data transmission system

1983-09-23

1985-12-10

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

370109, H04J 306

Patent

active

045584559

ABSTRACT:
In the modem based data transmission system the transmitting section provides a bit from each terminal (DTE) to be stored into a transmission buffer register (BX) under the control of an external clock signal derived from a modem internal transmission clock signal. The contents of the transmission buffer register is transferred into a transmission shift register and then transferred toward the modem through a formatting logic circuit wherein so-called stuffing bits and synchronization or flag characters are being inserted. Opposite operations are performed in the receiving section of the data transmission system.

REFERENCES:
patent: 3310626 (1967-03-01), Cassidy et al.
patent: 3414818 (1968-12-01), Reidel
patent: 3575557 (1971-04-01), McCowen
patent: 3621397 (1971-11-01), Murotanl
patent: 3636524 (1972-01-01), Holland
patent: 3961138 (1976-06-01), Fellinger
patent: 4054754 (1977-10-01), Nicodemus et al.
patent: 4072987 (1978-02-01), Walker
patent: 4126764 (1978-11-01), Downey et al.
patent: 4187394 (1980-02-01), Sievers
IBM Technical Disclosure Bulletin, vol. 18, No. 1, Jun. 1975, pp. 211-212, "Code Independent Message Framing Format", by Donnan.
Computer Design, vol. 14, No. 3, Mar. 1975, pp. 81-87, "Hardware Consideration for High Level Data Link Control Communication", by Cooper.
Electrical Communication, vol. 52, No. 1, Jan. 1977, pp. 74-79, "Digital Multiplex Signals for Data Transmission", by Dinglinger.

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