System for accurately confirming cross-connection in a cross-con

Details System for accurately confirming cross-connection in a cross-con System for accurately confirming cross-connection in a cross-con

1991-04-11

1993-08-31

Atkinson, Charles E.

Excavating

370112, 371 24, 371 251, G01R 3128

Patent

active

052415503

ABSTRACT:
On confirming whether or not a matrix switch correctly carries out cross-connection between input and output terminals of the switch in accordance with connection information signals memorized in a memory included in a controller, a cross-connection confirming system makes use of input digital signals which are sent from input lines to output lines through the matrix switch. Connected between the input lines and the input terminals, processing circuits make the input digital signals comprise input terminal codes assigned to the input terminals to which the processing circuits are connected, respectively. Judging circuits are connected to the output terminals to judge whether or not the input terminal codes included in output digital signals are coincident with output signals sent from the memory, respectively.

REFERENCES:
patent: 3008129 (1961-11-01), Katz
patent: 3049692 (1962-08-01), Hunt
patent: 4935921 (1990-06-01), Ishizaki et al.
patent: 5189410 (1993-02-01), Kosugi et al.

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