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:
Oct. 28, 1997
Filed:
Sep. 16, 1996
Tetsuya Uchida, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
An optical interface in a SONET system, wherein the optical interface includes a first multiplex/demultiplex apparatus for multiplexing/demultiplexing higher level signals of the main line side and lower level signals of the subscriber side and performing electrical/optical conversion of the lower level electrical signals and optical signals. An optical transmission line is provided for transmitting the optical signals. A second multiplex/demultiplex apparatus converts between the optical signals and a plurality of subscriber side line digital electrical signals. The overhead signals contained in the lower level signals and reaching the first multiplex/demultiplex apparatus are also contained in the optical signals and are transferred further from the first multiplex/demultiplex apparatus to the second multiplex/demultiplex apparatus.