This Recommendation provides an information model for the synchronous digital hierarchy (SDH).  This model describes the managed object classes and their properties that are useful to describe information exchanged across interfaces defined in M.3010 telecommunications management network (TMN) architecture.  This Recommendation specializes the generic object classes of Recommendation M.3100 to provide management information specifically for the SDH.

             Keywords: synchronous digital hierarchy, information model, managed object class, attributes, notification, action, GDMO, ASN.1.