This Recommendation contains a list of terms, definitions, and abbreviations used in Recommendations
dealing with Synchronous Digital Hierarchy (SDH) networks. SDH terms specific to synchronization or
physical layer or characteristics are not a part of this Recommendation.
ITU-T G.780-2008 history
2010ITU-T G.780-2010 Terms and definitions for synchronous digital hierarchy (SDH) networks (Study Group 15)
2008ITU-T G.780-2008 Terms and definitions for synchronous digital hierarchy (SDH) networks Study Group 15