This Recommendation | International Standard defines a systems management function which may be used by an application in a centralized or decentralized management environment to interact for the purpose of systems management as defined by CCITT Rec. X.700 | ISO/IEC 7498-4. This Recommendation | International Standard defines services for managing one to one back-up relationships and specifies a set of generic definitions. It is positioned in the application layer of ITU-T Rec. X.200 | ISO/IEC 7498-1 and is defined according to the model provided by ITU-T Rec. X.207 | ISO/IEC 9545. The role of systems management functions are described by CCITT Rec. X.701 | ISO/IEC 10040.

This Recommendation | International Standard:

• establishes user requirements for the service definition needed to support the change over function;
• establishes models that relate the service provided by the function to the user requirements;
• defines the services provided by the function;
• defines a managed relationship class documented in accordance with ITU-T Rec. X.725 | ISO/IEC 101657;
• defines managed object classes and associated management information in accordance with CCITT Rec. X.722 | ISO/IEC 10165-4;
• specifies the protocol that is necessary in order to provide the services;
• defines the relationship between the service and management operations;
• specifies the conformance requirements;
• specifies the ICS proforma for this function documented in accordance with ITU-T Rec. X.724 | ISO/IEC 10165-6 and ITU-T Rec. X.725 | ISO/IEC 10165-7.

This Recommendation | International Standard does not:

• define the nature of any implementation intended to provide this function;
• specify the manner in which management is accomplished by the user of this function;
• define the nature of any interactions that result in the use of this function;
• specify the services necessary for the establishment, normal and abnormal release of a management association;
• define relationship mappings that are dependent on the implementation of this function.