ITU-T G.774.3 [ Active ]

This Recommendation provides an information model, as related to the protection function for the Synchronous Digital Hierarchy (SDH). It identifies the Telecommunications Management Network (TMN) object classes required for the management of the protection function for SDH network elements. These objects are relevant to information exchanged across standardized interfaces defined in the Recommendation ITU-T M.3010 TMN architecture.

This Recommendation applies to SDH network elements which perform the Multiplex Section protection function and those systems in the TMN that manage SDH network elements. Functional capabilities of SDH multiplex equipment, particularly the Multiplex Section protection switching function, are given in ITU-T G.783. Performance monitoring requirements for Multiplex Section protection (for the management of SDH equipment with this capability) are provided in ITU-T G.784, however, the information model which supports these can be found in ITU-T G.774.1.

The new objects defined in this Recommendation supersede those defined in ITU-T G.774.3 (1994). For each object class, attribute, action, notification, parameter defined in this Recommendation it shall be indicated what the impacts upon the existing ITU-T G.774.3 (1994) are.

Structure of this Recommendation

Clause 5.1 provides an overview of the SDH protection information model in this Recommendation. Clauses 3 to 15 describe the information model using the notation mechanisms defined in ITU-T X.722 Guidelines for the Definition of Managed Objects. Clause 15 contains the syntax definitions of the information carried in the protocol using Abstract Syntax Notation One (ASN.1) defined in ITU-T X.680-X.683. Naming and Inheritance are diagrammatically shown in informative Appendix I. Diagrams illustrating the application of the SDH protection model are provided in informative Appendix II.