Summary - G.798.3 (02/2026) - Characteristics of optical transport network hierarchy equipment functional blocks – OTU and ODU

Recommendation ITU-T G.798.3 specifies both the components and the methodology that should be used to specify the optical transport network (OTN) functionality of network elements related to the optical transmission unit (OTU) and optical data unit (ODU) layers; it does not specify individual optical transport network equipment.