Patent ID: 7751712

Claim:
A Passive Optical Network, comprising: an Optical Line Terminal (OLT), an Optical Distribution Network (ODN), and an Optical Network Unit (ONU), wherein the ONU is configured to send data via a optical module in continuous mode; and the OLT is configured to receive the data from the ONU based on a set optical power threshold of data “0” and a set optical power threshold of data “1” and determine whether the optical power thresholds are to be adjusted based on a measured optical power in a network; if yes, adjusting the optical power threshold of data “0” and the optical power threshold of data “1”, otherwise, not performing the adjustment, wherein the optical power threshold of data “0” is a sum of a measured optical power of data “0” if no data is being transmitted and a first predetermined value; the optical power threshold of data “1” is a sum of an optical fiber attenuation power and a second predetermined value subtracted from a sum of a measured optical power of data “0” if no data is being transmitted and a launched optical power of power level “1”.