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:
Aug. 15, 1989
Filed:
Jan. 05, 1988
Yukio Nakano, Hachioji, JP;
Tadayuki Kanno, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a digital switching equipment or a digital cross-connect equipment including a plurality of receiving circuits, a multiplexer, a time division switch, a demultiplexer, and a plurality of transmitting circuits, each of the receiving circuits or the multiplexer has a circuit to insert a specific sequence into filling time slots of a plurality of subhighways of a highway having a plurality of time slots and each of the transmitting circuits and the demultiplexer has a circuit to detect the specific sequence inserted into the filling time slots such that when either one of the error detect circuits detects an error, a route change of the filling time slots is accomplished by means of a time division switch so as to predict a location of occurrence of a failure depending on a change in a detection state of the error detect circuits in association with the route change.