The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 1992
Filed:
Dec. 22, 1989
Applicant:
Inventors:
Assignee:
Alcatel N.V., , NL;
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 371 ; 371 376 ;
Abstract
A method of testing connecting and/or switching devices, particularly of a space-division multiplex switching matrix (K), in which one or more of a plurality of input lines (D.sub.i, C.sub.j) is connectable with one or more of a plurality of output lines (Y.sub.k), and which is carried out to check the formation of a check word is described. A first check word PB1 is derived from the signals on the input lines (D.sub.i, C.sub.j), and also, according to the same rules of formation, a second check word PB2 is derived from the signals on the output lines (Y.sub.k), both derived continuously. The two check words are compared to each other. In case of a disagreement, an error indication is provided.