Introduction to Computer Networking by Thomas G. Robertazzi

Author:Thomas G. Robertazzi
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

2.ODU (Optical Data Unit): ODU overhead includes optical path level monitoring, claim indication, protection switching bytes, and embedded communication channels. The ODU is the payload that is groomed and switched in the OTN network. The ODU plays a similar role as the line overhead does in SONET/SDH.

3.OTU (Optical Transport Unit): The OTU is an optical interface/port for different OTU rate streams. The OTU also includes performance monitoring for the optical layer, alarm indication, and a communication channel. It also adds the Forward Error Correction (FEC) coding. The OTU is similar to the section overhead in SONET/SDH.

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