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. 14, 1987
Filed:
Oct. 29, 1985
Masataka Kawamura, Tokyo, JP;
Masaharu Kamigaki, Tokyo, JP;
Iwatsu Electric Co., Ltd., Tokyo, JP;
Abstract
A telephone or like telecommunications network is disclosed which has n input highways and m output highways, where n is not less than m, each for the time division multiplex transmission of k channels of data. For selective data transfer between any selected channel of any selected input highway and any selected channel of any selected output highway, a digital, time division switching system is provided which comprises n data memories corresponding respectively to the n input highways, each data memory having k addresses corresponding respectively to the k channels of the corresponding input highway. A control circuit having a control memory causes the data from the input highways to be written sequentially into the data memories and for reading the data memories n times during a preassigned transmission period of each channel on the input and output highways. The data that have been read out from the data memories are gated to pass only the data that have been recovered from that address which corresponds to the selected channel, of that data memory which corresponds to the selected input highway, to the desired channel of the desired output highway.