Total Network Management (TNM) is a very large product developed by AT&T which facilitates early problem detection and prompt repair of telecommunication network facilities and switches. Network alarms are analysed to build up an overall picture of the network's current failures.

Major telecommunication hubs employ a number of operators to control maintenance of the network. Due to the volume of alarm messages, operators were unable to keep pace with the flow of information across their screens. An Event Correlation Expert feature package, ECXpert has been realised and incorporated into the TNM product family. ECXpert semi-automates the interpretation of alarms and enables operators to concentrate on crucial network failures.

TNM customers specify rules to co-ordinate their specific telecommunication networks needs; these are then compiled and acted upon by ECXpert together with live events. The event-simulation and correlation provides a high-level view on network failures.

ECXpert combines C++ and IF/Prolog code to provide support for object-oriented design with Prolog's reasoning and meta-language manipulation.

The system is currently installed in over 30 sites in several US telecommunication firms.

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