Data transmission system

Details Data transmission system Data transmission system

1989-08-30

1993-11-30

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082516, 371 62, 361 59, 361 94, H04Q 100

Patent

active

052669432

ABSTRACT:
A very useful data transmission system having a plurality of transmission modules connected to a single cable in a multidrop manner is disclosed herein. The system features its ability to check the transmission state at the level of individual modules through use of a proper code notation (typically, Manchester code). The system detects a specific module with proper signals lasting at the same level for more than a given time, except cable outputs, and treats it as involving a faulty condition and compels the transmission state to a halt, thus preventing only the faulty module or modules from transmitting signals thereby avoiding breakdown of the whole system.

REFERENCES:
patent: 4498082 (1985-02-01), Aldridge et al.
patent: 4561091 (1985-02-01), Scholl et al.
patent: 4888586 (1989-12-01), Ise et al.

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