Data extraction means for use in a data transmission system

Details Data extraction means for use in a data transmission system Data extraction means for use in a data transmission system

1980-01-21

1982-06-01

Brigance, Gerald L.

Multiplex communications

Wide area network

Packet switching

370 86, 370 4, H04J 306

Patent

active

043331769

ABSTRACT:
A serial-type data transmission channel employing a transmitter and a receiver and a plurality of coaxial cables interconnected therebetween with optical coupling being provided at the receiver. One of the coaxial cables is used to transmit data comprised of messages interposed with identifying data indicating whether a next following message is a data message or a control message. Another coaxial cable is used to transmit a clock at one repetition rate when a message is being transmitted and at another repetition rate when identifying data is being transmitted. The receiver employs the received clock to extract the message and identifying data from the received signals, and to also provide indications of message availability and of the type of message received.

REFERENCES:
patent: 3534264 (1970-10-01), Blasbalg
patent: 3862373 (1975-01-01), Cohen
patent: 3870828 (1975-03-01), Saliga
patent: 4001504 (1977-01-01), Hendrickson

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