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. 11, 1997
Filed:
Jul. 28, 1995
Carl Lindeborg, Shrewsbury, MA (US);
Edward Carroll, Wrentham, MA (US);
James Moran, Methuen, MA (US);
David Bartolini, Charlton, MA (US);
John Griesing, Santa Clara, CA (US);
Liz Lindell, Sutton, MA (US);
Anthony D Walker, Rougemont, NC (US);
Bradley S Trubey, Cary, NC (US);
IBM, Armonk, NY (US);
3COM Corporation, Santa Clara, CA (US);
Abstract
Beacon recovery is performed separately on each module. After a module recognizes that a beacon condition has occurred, each module checks to determine if the defect or fault is on its module. If the defect is on the respective module, the module disconnects itself from the remaining modules in the network and transmits a beacon frame onto an upstream end of the group of stations on that module. Each port on the module is then tested to determine if the error lies in the corresponding station. This testing is based on the presence or absence of the beacon frame.