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:
Apr. 22, 2008
Filed:
May. 03, 2004
Nabil N. Bitar, Winchester, MA (US);
Owen C. Mcnally, Nashua, NH (US);
Suresh Sathyanarayana, Nashua, NH (US);
Nabil N. Bitar, Winchester, MA (US);
Owen C. McNally, Nashua, NH (US);
Suresh Sathyanarayana, Nashua, NH (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A communication system comprising a plurality of sources, a plurality of destinations, and a plurality of switches forming an asynchronous transfer mode (ATM) network connecting the sources to the destinations. Each switch in the plurality of switches includes a plurality of line cards. The ATM network comprises a plurality of connections where, for each respective connection, one of the plurality of sources is linked to one of the plurality of destinations through the network by linking one or more switches, in the plurality of switches, that is associated with the respective connection. The ATM network further comprises operation administration and maintenance (OAM) cell processing circuitry for detecting a failure in a connection in the network. The failure is localized to the exact line card in a switch associated with the connection that is causing the connection to fail. The OAM cell processing circuitry detects the failure of the connection without use of the line card control blocks in the various line cards in the data path of the failed connection.