This paper presents an overview of the 5ESS 7 " system architecture. The administrative, communications, and switching modules are described, together with an overall view of the software architecture. Operations and maintenance aspects and a short discussion of evolutionary trends are covered.

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This paper presents an overview and introduction to the detailed technical papers that describe the Traffic Service Position System No. 1B. The objectives and design philosophy are discussed and the overall organization of the system is described.

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