Multiplex communications – Wide area network – Packet switching
Patent
1978-03-03
1980-09-30
Stewart, David L.
Multiplex communications
Wide area network
Packet switching
370 84, 370 86, 375107, H04J 306
Patent
active
042257522
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
Burroughs Corporation
Cass Nathan
Peterson Kevin R.
Stewart David L.
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