A apparatus and method for partial duplex protection switching by using single splitter in pon

A PON(Passive Optical Network) partial duplex protection switching apparatus using a single splitter and a method thereof are provided to configure an economical protection switching network and simplify a protection switching process by using a single 2:2 splitter and two N:1 splitters and providing only two links, an operation link and a protection links, between two splitters. A PON partial duplex protection switching apparatus in a G(Gigabit)-PON where one OLT(Optical Line Terminal) is connected with a plurality of ONTs(Optical Network Terminals) in a multiple access method comprises a single 2:2 splitter and two N:1 splitters. The 2:2 splitter is connected to two PON LTs(Line Terminals) in the OLT. The N:1 splitters are connected to the 2:2 splitter. Also each of the N:1 splitters are connected to two PON LTs in each of the ONTs.