Amendment 3 to Recommendation ITU-T G.783 (2006) includes text that clarifies the specification details applicable when transporting synchronous digital hierarchy (SDH) signals over the optical transport network (OTN)
ITU-T G.783 AMD 3-2006 Referenced Document
ITU-T G.783 Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks (Study Group 15)
ITU-T G.798 Characteristics of optical transport network hierarchy equipment functional blocks (Study Group 15)*, 2017-12-01 Update