The OTN specification includes framing conventions, nonintrusive performance monitoring, error control, rate adaption, multiplexing mechanisms, ring protection, and network restoration mechanisms operating on a wavelength basis. ITU-T recommendation G. 709, Interface for the optical transport network (OTN), is among the latest of these standards, and its aim is to address the transmission requirements of today's wide range of services; namely, it was developed to assist in network evolution to higher bandwidth and improve. Function diagram 200 Gbit/s transponder/muxponder, aggregating 4x40 Gbit/s and 4x10 Gbit/s into a single 200 Gbit/s /OTU2C standard OTN trunk. Supplement 58 to ITU-T G-series Recommendations describes several interoperable component-to-component multilane interfaces (across different vendors) to connect an optical module (with or without digital signal processor (DSP)) to a framer device in a vendor's equipment supporting 40G, 100G or. OTN is a Core Technology defined to provide end-to-end “pipes” to efficiently transport common access/transport client technologies, data rates and manage DWDM layers. The OTUk (k = 0 to 4) nomenclature is used to identify physical interfaces (ports). For more information on the OTN cards, see the data sheet In the case of channelization, ODU is created as a sub controller of an OTU controller. Optical Channel Data Unit (ODU ) contains information for maintenance and.