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. 09, 2001
Filed:
Mar. 11, 1998
Koji Tanonaka, Kawasaki, JP;
Naoto Kidoku, Kawasaki, JP;
Toshikazu Magome, Kawasaki, JP;
Hiroyuki Suzuki, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The invention concerns synchronization equipment; more particularly, the invention is directed to the provision of synchronization equipment which, after simple hardware installation and software setting, establishes a synchronization network with an existing network, SDH elements, etc. that do not support SSMB. The synchronization equipment comprises: a failure detection section for detecting a failure of each of a plurality of timing sources assigned prescribed priorities; a failure monitoring section for monitoring failure detection information from the failure detection section, and for outputting in the event of detection of a timing source failure a timing source switching control signal directing switching to a timing source having the highest priority among the timing sources other than the failure-detected timing source; a timing source selection section for outputting a timing source switching control signal based on the quality of synchronization derived from SSMB information; and a selection section for selecting one or the other of the two timing source switching control signals.