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:
May. 06, 2008
Filed:
Feb. 26, 2004
Tzu-jian Yang, Hsinchu, TW;
Kuan-ming Lin, Hsinchu, TW;
Yen-pin Tseng, Hsinchu, TW;
Ja-nan Wang, Hsinchu, TW;
Jeffrey Liu, Hsinchu, TW;
Tzu-Jian Yang, Hsinchu, TW;
Kuan-Ming Lin, Hsinchu, TW;
Yen-Pin Tseng, Hsinchu, TW;
Ja-Nan Wang, Hsinchu, TW;
Jeffrey Liu, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An Ethernet passive optical network (EPON) ring for providing protection against fiber failures. The optical network unit (ONU) is coupled to the ring fiber by a three-port passive optical splitting module that has three two-way optical passages. By the three two-way optical passages, the OUN receives/transmits data from/to the two ends of the optical line termination (OLT) to provide protection while the fiber failure. Moreover, it provides better authorization of users and simpler collision detection by the two-way transmission of the three-port passive optical splitting module to prevent hackers from invading and to reduce collisions.