ITU-T Recommendations

This Recommendation addresses management aspects of the synchronous digital hierarchy (SDH), including the control and monitoring functions relevant to SDH network elements (NE). The SDH management subnetwork (SMS) architecture, SDH embedded control channel (ECC) functions, and SDH ECC protocols are specified. Detailed message sets are for further study.The management of SDH equipment should be seen as a subset of the telecommunications management network (TMN) described in Recommendation M.3000, and reference is made to Recommendation G.773 for the specification of protocol suites to be used at external (Q) management interfaces.This Recommendation specifies for fault management, performance monitoring, and configuration management a library of basic equipment management function (EMF) building blocks and a set of rules by which they are combined in order to describe a digital transmission equipment's EMF functionality. The library defined in this Recommendation forms part of the set of libraries defined furthermore in Recommendation G.783.Not every function defined in this Recommendation is required for every application. Different subsets of functions may be assembled in different ways to provide a variety of different capabilities. Network operators and equipment suppliers may choose which functions must be implemented for each application.