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. 07, 1981
Filed:
May. 25, 1979
Applicant:
Inventors:
Makoto Ohnishi, Tokyo, JP;
Hirotoshi Shirasu, Yokohama, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ; H04B / ;
U.S. Cl.
CPC ...
370 58 ; 179 / ; 1791 / ; 364724 ;
Abstract
In a time-division-multiplexed exchanger having digital filters disposed in a channel system, a level adjuster wherein data for setting line losses corresponding to respective combinations of interconnections of a plurality of lines received at outgoing and incoming line terminals of the time-division-multiplexed exchanger are stored by storage means, and coefficients of the digital filters are controlled on the basis of the data at exchange operations, whereby the level adjustment is made.