Method for coded data transmission in half-duplex operation betw

Details Method for coded data transmission in half-duplex operation betw Method for coded data transmission in half-duplex operation betw

1980-07-03

1982-10-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

178 2217, H04L 900, H04L 514

Patent

active

043531261

ABSTRACT:
A method for the coded data transmission in half-duplex operation between data terminal devices of two data stations employs a code device of the one data station to transmit a phase-in program to the code device of the other data station. Thereby, the code devices of the two data stations communicate via corresponding data transmission devices in full-duplex operation. After phase-in of crypto units of the two data stations in one direction, change of direction programs, data and end identifications are transmitted, and in the opposite direction, simultaneously, synchronizing signals are transmitted.

REFERENCES:
patent: 3321573 (1967-05-01), DeSilva
patent: 3627928 (1971-12-01), Wolper
patent: 3878332 (1975-04-01), Morgan
patent: 4208544 (1980-06-01), Burke

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