Patent ID: 7800744

Claim:
A detection system for identifying faults in a passive optical network, comprising: a proportion coupler coupling at least one data signal and at least one detection signal to a fiber trunk in proportion; a splitter transmitting the data signals and the detection signals to at least one fiber branch; a reflected and filtering unit filtering the detection signals and the data signals, wherein one of the detection signals conforming to a reflection capability of the reflected and filtering unit is reflected as a reflected signal, and the data signal conforming to a frequency range of the reflected and filtering unit is transmitted to a user stage via the fiber branch; a fault position detection unit providing the detection signals and utilizing the reflected signal to determine the position of a fault of the fiber branch, wherein the reflection capability is suitable for the fault position detection unit; and a hookup survival detection unit utilizing the reflected signal to determine whether there is a fault within the fiber branch, wherein the hookup survival detection unit is an optical spectrum analyzer.