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:
Apr. 20, 1999
Filed:
Mar. 15, 1996
Takeshi Nagahori, Tokyo, JP;
Shuntaro Yamazaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Disclosed is an optical fiber network system which has optical transmitter-receivers disposed in optical network units(ONUs) of number N. an optical transmitter-receiver in a central office which is connected with the ONUs through a passive splitter to form one-to-N star connection, wherein multiplexing is conducted such that a downstream signal from the central office to the ONUs is treated by time division multiplexing(TDM) and a upstream signal from the ONUs to the central office is treated by time division multiple access(TDMA), characterized in that: the passive splitter is replaced by a multi-channel/single-channel conversion cable for interfacing between an array optical fiber with cores of number M and singlecore optical fibers of number M; the optical transmitter-receiver in the central office is replaced by an array optical transmitter and an array optical receiver; and the array optical transmitter and the array optical receiver are connected with the multi-channel/single-channel conversion cable through an array optical fiber cable.