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, 2004
Filed:
Jun. 15, 1999
Ernesto Colizzi, Monza, IT;
Marco Lovadina, Milan, IT;
Alcatel, Paris, FR;
Abstract
A switch matrix among tributaries of a telecommunication network operating on flows of data which are arranged according to SDH protocol, said switch matrix comprising a set of parallel branches, each of said branches comprising at least a space stage able to select and pack from the input data flow a subset of data to be exchanged, a second time stage able to store the data subset to be exchanged and comprising a random access memory device associated with a write memory and a read memory, said write memory and read memory being driven by a microprocessor and a master counter. The invention is characterized in that the read memory and write memory of each random access memory device are updated in association with a spare read memory which is common to read memories on all branches in parallel and with a spare write memory which is common to write memories on all branches in parallel, respectively.