PROTECTION APPARATUS AND METHOD FOR AN OPTICAL NETWORK UNIT IN A PASSIVE OPTICAL NETWORK, PARTICULARLY FOR MAINTAINING SERVICE OF AN OPTICAL SUBSCRIPTION TERMINAL BY SENSING THE FAILURE OF AN OPTICAL LINK

摘要

PURPOSE: A protection apparatus and method for an optical network unit in a passive optical network are provided to conveniently recover the failure happening in an optical distribution device or an optical line.;CONSTITUTION: An optical signal transceiver(110) receives a down-stream of an optical line terminal through a protection switching optical distribution network or a main optical distribution network. An up-stream of an optical network unit is received through a main optical distribution network or the protection switching optical distribution network. An optical signal controller(120) detects whether or not the down-stream or up-stream of the optical subscription terminal has failure. When the failure happens, the down-stream or the up-stream is transmitted thorugh the protection switching optical distribution network.;COPYRIGHT KIPO 2010