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. 06, 1998
Filed:
Jul. 16, 1996
Hisayuki Maruyama, Ebina, JP;
Jushi Ide, Mito, JP;
Seiichi Yasumoto, Hitachi, JP;
Sadao Mizokawa, Katsuta, JP;
Ken Onuki, Hitachi, JP;
Toshio Ishihara, Hitachi, JP;
Masato Satake, Ibaraki-ken, JP;
Toshihiko Uchiyama, Hitachi, JP;
Hitachi Ltd., Tokyo, JP;
Hitachi Process Computer Engineering, Inc., Hitachi, JP;
Abstract
A plurality of different fault locating functions are provided in a communication system comprising a plurality of terminals connected to a data transmission channel. The functions are at different levels, respectively, ranging from a level for rapid fault location to a level for reliable and sure fault location. Upon detection of an occurrence of a fault, one fault locating function is performed. If the fault is not located accurately located, another fault locating function of a level for more reliable is performed, thus the functions are performed sequentially in the order from the level for rapid location to the level for more deliberate and reliable location. Preferably, the channel is reconfigured to avoid the fault, according to the fault located by the functions of the respective levels. With this arrangement, a fault which does most possibly occur can be located quickly, while another fault difficult to locate can be located accurately.