Patent ID: 7680414
Filing Date: 2010-03-16
Classification: H04J,H04Q

Abstract:
1. A Passive Optical Network system for connecting a parent station and each of a plurality of subsidiary stations by means of an optical fiber network including an optical splitter, wherein said parent station is provided with: (1) a receiver circuit receiving optical signals from each of said plurality of subsidiary stations by using threshold values discriminating 0's and 1's; and (2) and a control part including: wherein said control part, when a ranging operation is to be performed for an arbitrary subsidiary station, controls: wherein, when the bandwidth setting part transmits a transmission timing signal to the arbitrary subsidiary station, the threshold for the arbitrary subsidiary station having been stored in the second memory is set at the receiver circuit through the selector in response to a termination of transmission of an optical signal for another subsidiary station before the timing signal.