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:
Nov. 02, 2004
Filed:
Oct. 19, 1999
Applicant:
Inventors:
Keiichi Otani, Kawasaki, JP;
Takaya Yamamoto, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 1/226 ;
U.S. Cl.
CPC ...
H04L 1/226 ;
Abstract
A system for communication via cable-television communication lines includes a center device which generates a loop-detection packet for detecting a loop that is a defect of a network configuration, and a cable modem which is situated between said center device and a subscriber end, and detects the loop by regarding a receipt of the loop-detection packet from the subscriber end as a detection of the loop.