A system platform for a communication system

摘要

An object oriented system platform for a telecommunication system that provides subscriber services includes an upper layer containing applications in the form of base and supplementary functions providing base and supplementary services. This layer is implemented with base objects and extension objects. The base objects are object types implementing functions which may need extension in the future, each object type being designed for a particular task which can be performed with a minimum of coordination with other base objects. The extension objects are object types implementing extension functions which form extensions to the base functions and make it possible to add new services and modify and extend existing services without changing the software of a system that has already been implemented and supplied.