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:
May. 07, 1991
Filed:
Apr. 06, 1989
Applicant:
Inventors:
Masahiro Shinbashi, Kawasaki, JP;
Takashi Wakabayashi, Yokohama, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370 16 ; 371-81 ;
Abstract
A switching system for switching from a unit or units in a working state to a unit or units in a stand-by state in which the units in a stand-by state are provided as either individual stand-by units or as common stand-by units. An individual stand-by unit or a switching unit can be accommodated at a position at which it forms a pair with a working unit, and a working unit or units which are to be connected to a switching unit upon the occurrence of failure of the working unit or units are automatically connected to a common stand-by unit.