scope:

This European Telecommunication Standard (ETS) defines the information model to be used at the interface between Network Elements (NEs) and management systems, for the management of NEs which use the connection supervision function (Higher Order Connection Supervision / Lower Order Connection Supervision (HCS/LCS)).

This ETS defines:

- the information model for Synchronous Digital Hierarchy (SDH) NEs using connection supervision function.

This ETS does not define:

- the protocol stack to be used for message communication;

- the network level management processes;

- the application contexts;

- the conformance requirements to be met by an implementation of this information model;

- information models for other systems or equipment.

The information model (and the corresponding message set) defined in this ETS is concerned with the management of NEs, the equipment by which they are implemented and the functions contained within them. More precisely, it applies to an equipment domain visible at the element manager to element interface and is only concerned with information available within that domain. Information proper to the domain of a network level management process is not included within this model.

The HCS and LCS functional blocks (connection supervision) are specified as optional components and a standardized modelling at the Q3 interface is provided by this ETS. The connection supervision functionality is included into subclasses of SDH connection termination points.