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:
Apr. 09, 1996
Filed:
Jun. 02, 1995
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical switching system to which a plurality of input transmission lines and output transmission lines for transmitting optical signals are arranged and connected, and in which fixed length cells transmitted from the input transmission lines are switched based on the routing information contained in the cells and the switched cells are outputted to the output transmission lines includes: optical cell synchronizer portions for detecting the fronts of the cells and synchronizing the fronts of the cells incoming from respective transmission lines; a switching portion for converting respective cells the fronts of which are synchronized to those of different wavelengths by input transmission lines and for switching them based on the routing information in the cells; multiplexer portions for wavelength division multiplexing the cells switched to different wavelengths by input transmission line with respect to respective output transmission lines; demultiplexer portions for splitting cells wavelength division multiplexed in the multiplexer portions by cell and aligning them in a time series, and wavelength converter portions for converting the cells split in the demultiplexer portions to cells having a predetermined single output wavelength.