Patent ID: 7283748

Claim:
A self-healing WDM (Wavelength Division Multiplexing)-PON (Passive Optical Network) apparatus having a CO (Central Office), a RN (Remote Node) and a plurality of subscriber units, comprising: a trunk working fiber and a trunk protection fiber for connecting the CO with the RN; and a distribution working fiber and a distribution protection fiber for connecting the RN with the subscriber units, wherein the CO contains a 2×2 optical switching unit switched if an error or communication failure occurs, an upstream working optical receiver and an upstream protection optical receiver for receiving upstream data, and a downstream working light source and a downstream protection light source for transmitting downstream data, and wherein each of the subscriber units contains a 2×2 optical switching unit switched if an error or communication failure occurs, a downstream working optical receiver and a downstream protection optical receiver for receiving downstream data, and an upstream working light source and an upstream protection light source for transmitting upstream data.