In DWDM systems, the Optical Wavelength Conversion Unit (OTU) is a crucial component that plays a vital role in optimizing wavelength resources, improving system flexibility, and enhancing network performance. This article compares OTN interfaces, specifically OTU1, OTU2, OTU3, and OTU4, highlighting the key differences between them. OTU stands for Optical Channel Transport Unit, and OTN stands for Optical Transport Network. It is a standardized digital wrapper defined by the ITU-T (International Telecommunication Union) in the G. The architecture is. The optical transport network (OTN) was created with the intention of combining the benefits of SONET/SDH technology with the bandwidth expansion capabilities offered by dense wavelength-division multiplexing (DWDM) technology.
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