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. 26, 1989
Filed:
Feb. 12, 1988
Hisao Kawano, Yokohama, JP;
Kunio Yamamoto, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A remote maintenance system for a digital communication network, comprises local offices (LOs), at least two of which are grouped and connected to each other by a local line in the group, and a centralized maintenance and operation center (CMOC) located at a tandem office and connected to each LO by an ordinary digital transmission line (DTL) using the No. 7 Common Channel Signaling (CCS) system recommended by the CCITT. When a serious fault, such as system-down, occurs in a first LO in the group, a serious alarm signal is sent from the first LO to the CMOC through the local line, a second LO in the group and the DTL connecting the second LO and the CMOC, so that maintenance data for repairing the serious fault are provided at the CMOC and sent, under the No. 7 CCS system, to the first LO through the DTL toward the first LO. The maintenance data is sent without using a local switching network in the first LO, and can be sent through the DTL toward the second LO, the second LO and the local line to the first LO.