ing and Facilities software, manages the allocation of telephonic re- The AXE system concept sources and it interfaces with the Database software (recalling data for prefix handling and routeing information). 32.8.1 Introduction 14. The charging software performs call charging and accounting functions. 15. The administration software allows measurements, statistical The AXE system from Ericsson is widely deployed throughout the and network management functions to be performed in an world. Today, AXE exchanges are in service in local, long distance, international and cellular mobile networks in some 80 countries. exchange. 16. Hardware and Software Extensions software enable extensions AXE supports a complete range of telecommunication network on hardware devices and updates of software functions. applications. It is fully digital and designed to minimise overall network and handling costs. Stored Programme Control provides for an open ended supply of new features and services. 32.7 System 12 operation and A unique modularity structure is the corner-stone of the AXE maintenance (O&M) system concept. Operations and maintenance is the key to ensuring a high level of 32.8.2 System structure service quality. System 12 O&M facilities provide the following advantages for an administration: The philosophy behind AXE is embodied in one word - modu- larity. Modularity means easy handling and ability to adapt to the Simple procedures for daily operations, such as line additions, changing world of telecommunications. Throughout the system, in trunk additions, trunk group assignments, changes, etc. both hardware and software, modularity is the guiding principle. An effective charging system, for accurate and prompt billing, This facilitates software and hardware design, system upgrades, system extensions and multi-functionality in network applications. 3. Easy exchange expansion or modification to satisfy increased The AXE architecture is a five level hierarchy, each level made up traffic handling requirements or changing net