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:
Feb. 02, 1999
Filed:
Feb. 20, 1996
Morihito Miyagi, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In an asynchronous transfer mode (ATM) network, if an originating terminal notifies necessity or unnecessity of transmitting a fault notification signal through a call set-up message, the content of the notification is notified to respective node devices on a target virtual path (VP) in the procedures of transmission/reception of a call control message. Each of the node devices makes a virtual channel (VC) table of a line interface 100 corresponding to the VP store the information indicating necessity or unnecessity to transmit a fault notification signal. When a fault arises in the VP, one of the node devices on the downstream side detects the fault, its interface connected to the fault VP sees the VC table and determines the necessity or unnecessity of fault management operation and maintenance (OAM) cell support with respect to respective VCs multiplexed on the fault VP, so as to issue a fault management OAM cell with respect to only VCs regarded as necessary.