Half-duplex modem without turnaround delay

Details Half-duplex modem without turnaround delay Half-duplex modem without turnaround delay

1985-07-05

1987-05-26

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 13, 455 70, H04B 138

Patent

active

046690905

ABSTRACT:
A modem is operated in a half-duplex mode having various elements which are trained on data and which are locked up while data is not exchanged, thereby eliminating the need for a preamble. A preamble is used only if the period between successive transmissions exceeds a preselected threshold.

REFERENCES:
patent: 4044307 (1977-08-01), Borysiewicz et al.
patent: 4241398 (1980-12-01), Carll

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