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:
Mar. 31, 1992
Filed:
Aug. 21, 1989
Applicant:
Inventors:
Masao Kunimoto, Yokohama, JP;
Jiro Kashio, Kawasaki, JP;
Makoto Mori, Yokohama, JP;
Shinobu Gohara, Yokohama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
370 60 ; 370 601 ;
Abstract
A subscriber line signalling apparatus for use in an asynchronous mode communication system includes a switching circuit having a plurality of input terminals and a plurality of output terminals. The switching circuit selectively communicates fixed length information packets to an adaptation processing unit. The adaptation processing unit reassembles the fixed length packets to signalling frames, and transmits them to a frame processor.