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. 02, 1997
Filed:
Apr. 27, 1995
Nai Po Lee, Chapel Hill, NC (US);
Jay Lee Smith, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus and method for fault isolation and bypass in a dual ring communication system provides a reconfiguration unit capable of attachment to a dual ring communication system having a plurality of reconfiguration units. The disclosed reconfiguration unit has a single adapter to the dual ring communication system and includes isolation and wrap switches capable of isolation and bypass of faults. A reconfiguration unit having a single adapter to the dual ring communication system detects failures on the ring and generates a failure frame which if not received from the ring causes the reconfiguration unit to enter a downstream wrap state. The reconfiguration unit enters an upstream wrap state if a failure frame is received from the nearest downstream reconfiguration unit.