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:
Sep. 08, 1992
Filed:
Feb. 08, 1991
Applicant:
Inventors:
Werner Nagler, Hohenschaeftlarn, DE;
Rudolf Krumenacker, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
375 10 ; 370 15 ; 370 16 ; 371 205 ;
Abstract
The interfaces between line terminator groups of a pair of redundant line terminator groups each comprise an interface circuit which makes it possible, by being equipped with a write-read memory, a switch-over device and a control device that controls these components, to test the interface parts belonging to an active line terminator group in a spot-check fashion during a time channel reserved for this purpose and to test the interface parts belonging to the passive line terminator group during all time channels on the basis of a respective check word mirroring.