Repeating station for use in digital data communications link

Details Repeating station for use in digital data communications link Repeating station for use in digital data communications link

1979-05-10

1981-08-18

Curtis, Marshall M.

Telegraphy

Systems

Line-clearing and circuit maintenance

178 71T, H04L 2502

Patent

active

042848431

ABSTRACT:
A repeater for use in a data communications link, particularly of the type to provide the exchange of process control information with external controlled equipment, includes a detector for detecting incoming data presented on the data communications link. Through the use of a free running internal clock, the data is retimed, reconstructed through the use of a modulator and presented to a transmitter for placement back on the data link. The repeater further provides data and clock signals to the external controlled equipment and receives signals from that equipment which serve, by way of logic circuitry within the repeater, to effect the modification of the data received by the repeater to thus enable the controlled equipment to communicate with other elements connected to the link.

REFERENCES:
patent: 2839605 (1958-06-01), Ridler et al.
patent: 3410957 (1968-11-01), Schiebeler
patent: 3873775 (1975-03-01), Chown

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