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:
Jan. 25, 2000
Filed:
Oct. 02, 1997
Hirokazu Ishimatsu, Tokyo, JP;
Takashi Watanabe, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
To effectively collecting information necessary for maintenance of the optical transmission system from each optical repeater equipment, in an optical transmission system of the wavelength division multiplexing type according to this invention, a repeater unit 210-1 in optical repeater equipment 200 detects the wavelengths of optical signals .lambda.1 to .lambda.q', the directions of optical signals, the transmission line ID Nos., and so on by using an optical couplers 211, 219, demultiplexers 212, 213, O/E converters 214-1.about.p, 215-1.about.q, and local oscillators 216-1.about.p, 217-1.about.q, and a supervisory control signal, including information about the detection results and a light amplifier 218, is sent to optical terminal equipment 100.