Optical Network Unit, and Communications System and Method

An optical network unit (ONU), comprising a passive optical network media access control (PON MAC) module, a processing module and at least two user interface modules, wherein, the processing module comprises a physical bridge submodule and at least two ONU submodules connected with the physical bridge submodule, the ONU submodules are in one-to-one correspondence with the user interface modules, and different ONU submodules correspond to different identification information;

• wherein the PON MAC module is configured to:
• be connected with the processing module, and receive network side data, wherein the network side data comprise identification information;
• determine corresponding ONU submodules according to the identification information in the network side data, and send the network side data to the physical bridge submodule;
• the physical bridge submodule is configured to:
• distribute the network side data to corresponding ONU submodules according to the ONU submodules determined by the PON MAC module;
• and
• the ONU submodule is configured to:
• process the received data, and then send the processed data to the user interface module corresponding to the ONU submodule.