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:
Jul. 23, 2002
Filed:
Jun. 08, 1999
Brent K. Parrish, Hollis, NH (US);
Ronald A. McCracken, Pelham, NH (US);
John J. Fernald, Nashua, NH (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A telecommunications device includes a local area network with redundant first and second buses. Multiple cards coupled to the first and second buses communicate using the first bus. A first monitor coupled to the first and second buses detects a failure of the first bus and communicates a message indicating the failure using a data network. A second monitor also coupled to the first and second buses may detect the failure of the first bus and may also communicate a message indicating the failure using the data network. The first monitor and the second monitor may receive the messages from one another and cause the cards to communicate using the second bus. In a more particular embodiment, the second monitor transmits a test signal using the first bus in response to the message from the first monitor.