Patent ID: 8824890

Claim:
An open optical access network system allowing at least one subscriber to be connected to at least one service provider through a common optical infrastructure, the open optical access network system comprising: an optical line terminal (OLT) configured to transmit and receive optical signals that are modulated in a wavelength division multiplexing (WDM) and a time division multiplexing (TDM); an optical network unit (ONU) configured to separate and receive an optical signal of a predetermined wavelength from the optical signal received from the OLT, separate and receive an optical signal of a predetermined time from the separated optical signal having the predetermined wavelength, and send the OLT an optical signal which is obtained by modulating the received optical signal of the predetermined wavelength or an optical signal which is obtained by modulating the received optical signal of the predetermined time; and an optical dividing/coupling unit configured to divide or couple the optical signal transmitted and received between the OLT and the ONU.