Multiplex communications – Wide area network – Packet switching
Patent
1979-07-19
1981-06-02
Bookbinder, Marc E.
Multiplex communications
Wide area network
Packet switching
375 36, 375 59, 375113, H04J 312, H04L 2545
Patent
active
042715105
ABSTRACT:
Shift-register transmitting means for use in a serial type data transmission channel employing a plurality of coaxial lines for communicating digital data from the transmitting means to a receiving means. The transmitter means comprises a plurality of shift registers and associated transmitter logic which provide for the transmission of data messages and message identifying data on a first coaxial line and the transmission of a clock on a second coaxial line in a manner such that the transmitted clock is transmitted at a first repetition rate when a message is being transmitted and at a second repetition rate when message identifying data is being transmitted. The transmitter logic operates in conjunction with the shift registers for selectively shifting applied data in opposite directions so as to provide for the expeditious serial application of message and message identifying data to the first coaxial line during separate time periods.
REFERENCES:
patent: 3862373 (1975-01-01), Cohen et al.
patent: 3870828 (1975-03-01), Saliga
patent: 4220822 (1980-09-01), Kawai et al.
Bookbinder Marc E.
Burroughs Corporation
Cass Nathan
Peterson Kevin R.
Rasmussen David G.
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