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:
Jan. 03, 1995
Filed:
Jul. 06, 1992
Fujitsu Limited, Kawasaki, JP;
Abstract
System for controlling access competition among a plurality of terminals under the DQDB protocol in a B-ISDN where the terminals are electrically connected to a dual bus with a downbus and an upbus extending from a network terminal. Each of the terminals has data transmission processor, downbus processor, upbus processor, a timer and failure detector. When data transmission request is issued from the data transmission processor, the failure detector is activated in response to a request to start the timer so as to count a given time interval which has elapsed. If either a request message or data cannot be sent even when the timer reaches a predetermined value, the failure detects signals that a failure has occurred in the dual bus.