Optical transport network

Mere functionality of switching, management, supervision shall not make it OTN, unless the signals are carried through optical fibre.

Unlike SONET/SDH, OTN provides a mechanism to manage multiplexed wavelengths in a DWDM system.

[2] OTN was designed to provide higher throughput (currently 400G) than its predecessor SONET/SDH, which stops at 40 Gbit/s, per channel.

The following ODUk information structures are defined in ITU-T Recommendation G.709 At a very high level, the typical signals processed by OTN equipment at the Optical Channel layer are: A few of the key functions performed on these signals are: The OTN signals at all data-rates have the same frame structure but the frame period reduces as the data-rate increases.

On a point-to-point OTN link there is latency due to forward error correction (FEC) processing.

Function diagram 200 Gbit/s transponder/muxponder, aggregating 4x40 Gbit/s and 4x10 Gbit/s in to into a single 200 Gbit/s /OTU2C standard OTN trunk.
OTN multiplexing and mapping structures. Show the relationship between ODU Clients, ODU, ODU-Groups and OTU