Knowing that the 5G networks are going to dominate both Telecom and Datacom and more and more 5G base stations are under establishment, Nuvoton serves a total solution of Optical Transceiver from Fronthaul to Backhaul, or even from current optical transmission scenarios to new WDM (Wavelength Division Multiplexing) scenarios. For this new-coming WDM application, Nuvoton offers an MCU with built-in hardware Manchester Codec to implement the Pilot Tone Modulation for OAM data transmission.