Multiplexing system line fault isolation and identification

Details Multiplexing system line fault isolation and identification Multiplexing system line fault isolation and identification

H - Electricity

04

J

340/73

H04J 3/14 (2006.01)

Patent

CA 1140229

ABSTRACT In a multiplexing signalling system for two-way data tranmission over a single transmission line, the line is configured as a loop terminating at each end at a central or control station, thereby furnishing two communication paths between the central station and each of a plurality of remote stations distributed along the line. Transmission of signals from the central station and reception of signals at the control station are duplicated at the line ends so that an open line fault can readily be identified from an analysis of signals received at the central station. Switches at the remote stations operable in accordance with reception of signals along both communication paths serve to isolate and identify line ground faults.

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