Data communication apparatus

Communications: electrical – Digital comparator systems

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Details

340 23, 370 86, H04Q 900, H04J 300

Patent

active

042053269

ABSTRACT:
A data communication apparatus adapted for use as a train describer system has a multiplicity of modules serially connected in a closed loop, each such module being arranged to transmit data to, and receive data from the two adjacent modules in the loop, a plurality of the modules located at spaced positions around the loop also being "interconnection" modules adapted to transmit data directly to and receive data directly from the adjacent interconnecting module or modules of the plurality.

REFERENCES:
patent: 3790717 (1974-02-01), Abramson et al.
patent: 3879710 (1975-04-01), Maxemchuk et al.
patent: 4081612 (1978-03-01), Hafner

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