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:
Sep. 17, 1996
Filed:
Jun. 07, 1995
Toshiharu Sakai, Osaka, JP;
Yoshinori Nakamura, Osaka, JP;
Takashi Umegaki, Osaka, JP;
Nobuo Iguchi, Osaka, JP;
Miki Hagino, Osaka, JP;
Hiroaki Mori, Osaka, JP;
Toshikazu Ota, Osaka, JP;
Akihiko Oka, Kanagawa, JP;
Kazuo Takatsu, Kanagawa, JP;
Nobuyuki Nemoto, Kanagawa, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
An optical terminal system having self-monitoring function is disclosed, which includes a high-level group loopback section for internally looping back a serial electric signal, a low-level group loopback section for internally looping back a parallel electric signal, a self-loop section for connecting a receiver device and a transmitter device to loop an electric signal received by the receiver device directly to the transmitter device, and a self-monitoring controller for performing a self-monitoring test on respective components of the receiver device and transmitter device by using the self-loop section and either one of the high-level group loopback section and the low-level group loopback section. The optical terminal system can selfcheck the functions thereof through self-monitoring without depending on a network.