Patent ID: 8150262

Claim:
An optical communications network comprising: a plurality of optical network units each including a variable optical attenuator for attenuating a received downstream optical signal and a transmitted upstream optical signal, a transceiver for extracting a downstream control signal from the downstream optical signal and generating the upstream optical signal from an upstream control signal, and an optical network unit controller, and an optical line terminal in code division multiplexing communication with the plurality of optical network units and including an optical intensity measuring device for measuring the intensity of a received upstream optical signal, a memory for storing a control table having information about the plurality of optical network units readably and writably, a transceiver for extracting the upstream control signal from the upstream optical signal and generating the downstream optical signal from the downstream control signal, and an optical line terminal controller, wherein the control table is configured to store information about a received intensity of an upstream optical signal received from each of the plurality of optical network units and a preset attenuation in the variable optical attenuator at each of the plurality of optical network units that enables the optical line terminal to set an attenuation of the variable optical attenuator at each of the plurality of optical network units.