Optical line terminal device and optical network device

PURPOSE: An optical line terminal device for controlling power and an optical network end device are provided to include traffic monitoring units for monitoring uplink and downlink traffics of the optical line terminal. CONSTITUTION: A MAC(Media Access Control) block(120) converts port IDs and Ethernet packets into a downlink frame or converts an uplink frame into the port IDs and the Ethernet packets. A traffic monitoring unit(123) of the MAC block supplies ID information of an ONT(Optical Network Terminal) or an ONU(Optical Network Unit). A CPU(Central Processing Unit)(130) generates a control frame according to ID information.