Patent ID: 6674752
Filing Date: 2004-01-06
Classification: H04J,H04Q

Abstract:
A switch matrix among the tributaries of a telecommunication network, specifically a telecommunication network operating on flows of data that are arranged according to SDH protocol, said switch matrix comprising:a set of parallel branches, each of said branches comprising: at least a first space stage that is able to select and pack, from the input data flow, a subset of data to be exchanged, wherein the first space stage comprises means for selecting and packing the subset of data to be exchanged, and wherein said means for selecting and packing make use of a recursive structure of shifter circuit, wherein said recursive structure of shifter circuits is driven by combinatorial logic means which elaborate a write sequence on the subset of data to be exchanged provided by the write memory, said logic means comprising a recursive structure of adders; and a second time stage that is able to store the data subset to be exchanged, and 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, wherein the read memory and write memory related to each random access memory device are updated together with a spare read memory that is common to read memories on all branches in parallel and with a spare write memory that is common to write memories on all branches in parallel, respectively.