| 摘要 |
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.
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