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:
Jul. 25, 2000
Filed:
Nov. 12, 1997
Applicant:
Inventors:
Satoru Okamoto, Yokoyama, JP;
Kenichi Satou, Yokohama, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Shinju-ku, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ; H04J / ; H04J / ; H04B / ;
U.S. Cl.
CPC ...
370506 ; 370535 ; 359110 ; 359135 ;
Abstract
In optical path signal termination equipment which converts between an SDH signal transmitted at the electrical level and an optical path signal transmitted at the optical level, an optical path supervisory signal is inserted in the optical path signal without increasing the signal length. This is accomplished by utilizing the SDH section supervisory signal area contained in the SDH signal as the area for the optical path supervisory signal in the optical path signal.