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:
Sep. 19, 1995
Filed:
Aug. 19, 1993
Seiji Kitayama, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A digital transmission apparatus for subscribers, includes a switch function unit performing multiplexing into subscriber time slots by receiving as its input transmission signals communicated between subscriber side transmission lines and feeder transmission lines. The apparatus sets one or more lines among a plurality of feeder transmission lines as a protection transmission line with respect to an active feeder transmission line. A selector function unit performs a connection change-over of the path of the active feeder transmission line in which a transmission fault occurred to a protection transmission line preliminarily allocated to the related active feeder transmission line.