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. 13, 2004
Filed:
Mar. 22, 2000
Applicant:
Inventor:
Akira Inaba, Yokohama, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 1/250 ;
U.S. Cl.
CPC ...
H04L 1/250 ;
Abstract
Different signal patterns are inserted in different time slots within a vacant slot for signals passing through redundantly configured units. A selector, which selects one of the units as a working unit, is controlled to select the inserted signal patterns in sequence. A pattern monitoring circuit is provided on the output side of the selector, and identifies a faulty unit by detecting an abnormality in a signal pattern.