Discovery method for oam capability in ethernet passive optical network

The invention according to a registration request from a manual relates to OAM (Operations, Administration & Maintenance) capability discovery (Discovery) method in the optical network, a large number of ONU (Optical Network Unit) the OLT (Optical Line Termination) is connected after assigning an ID for identifying each ONU, the process in which the OLT transmits the OAM capability information messages (Initiate_OAM_Discovery) starting a discovery operation of the OAM function of the number of the ONU, and the OAM capability information messages (Initiate_OAM_Discovery) an OAM capability information message (Report_OAM_Discovery) to report that the OAM function, each ONU has received from the respective ONU is made to the process of the OLT is received. OAM (Operations, Administration & Maintenance) capability discovery, OLT (Optical Line Termination), (Optical Network Unit) ONU