MOUNTAIN VIEW, Calif. - July 13, 1999 - Advanced visualization components from ILOG (NASDAQ: ILOG, EURO.NM: ILOG), the world's leading supplier of software components, have been selected by Deutsche Telekom (NYSE: DT) to power the graphical user interface (GUI) of the new network management solution for its international switching systems. The third-largest telecommunications carrier in the world and the largest in Europe, Deutsche Telekom will embed ILOG TGO (Telecom Graphic Objects) and ILOG Views components as the core of the system's 250-window GUI in order to save development time and assure a high level of performance and standardization.

The management system -- Management Technik Ausland (MTA) -- was developed by Deutsche Telekom's southwest development center and will soon be managing the traffic of 10 international switches through 50 Windows NT clients in six supervision centers in Germany. Using ILOG TGO and ILOG Views enabled the center to quickly develop 250 different windows for key functions such as traffic monitoring, administration and reports.

"We chose ILOG TGO because we strongly believe it will become the de facto standard for network management GUIs," said Klaus Schmitt, manager of the TMN business unit at Deutsche Telekom Development Center Southwest. "This product gives both us and equipment manufacturers a way to use common development components, ensuring a consistent look and feel for our management systems."

The ambitious MTA project involved 40 developers and resulted in a comprehensive, distributed system with a three-tiered architecture based on CORBA middleware and the HP OpenView platform. The powered-by-ILOG GUI is at the presentation layer.

MTA aims at delivering the right information to improve service quality. MTA's important function is to survey and analyze telephone traffic that flows throughout the international switches. It takes into account specific switch characteristics such as service- and carrier-dependent routing in multi-carrier environments.

With MTA, traffic alarms can be handled in real time and customized reports can be produced for back-office operations. The use of data is maximized to identify bottlenecks and improve traffic routing. Thresholds can be dynamically activated and modified to set up traffic alarm levels that tell, destination by destination, whether the number of connections is sufficient for the number of calls.

"A GUI made with ILOG TGO is quite distinctive and user friendly," Schmitt explained. "Human factors studies in telecom have given it a unique look and feel. Alarms stand out distinctly and network elements appear in fine relief. The ILOG Views engine provides by far the highest performance for displaying graphics."

ILOG TGO (Telecom Graphic Objects) is the first component dedicated to displaying telecommunications networks and equipment. Based on ILOG's recognized expertise in graphic software technology and close collaboration with top design laboratories in telecommunication, the intuitive ILOG TGO GUI allows telecom operators to supervise networks more effectively.

An add-on module to the widely deployed ILOG Views graphics library, ILOG TGO provides up to 85 percent of the code for developing telecom GUIs. Applications built with it are more powerful, have faster time-to-market and less costly overall than applications based on non-dedicated visualization components. Telecommunications companies that have used ILOG TGO-based user interfaces agree that they are more intuitive, friendly, and ultimately reduce human errors. The component also comes in a 100 percent Pure Java� version, ILOG JTGO, for web-based network management systems.

About Deutsche Telekom
Deutsche Telekom is Europe's largest telecommunications company and the third largest worldwide. It offers the entire range of telecommunications services. The company invests internationally in order to be able to provide its international customers with a comprehensive portfolio of telecommunication services. Deutsche Telekom's representatives, co-operations and joint ventures serve customers in over 65 countries around the world. More information can be found at www.telekom.de.

About ILOG
ILOG (NASDAQ NMS: ILOG; EURO.NM: ILOG) is the world's leading provider of advanced C, C++ and Java software components for graphics and resource optimization. ILOG products deliver high-performance data visualization for user interfaces; integer, linear and constraint solvers for resource optimization, scheduling, logistics and planning applications; dynamic rules systems for intelligent agents and real-time data flow control; and components for integrating modules with real-time and relational data sources. ILOG was founded in 1987 and now employs approximately 480 people in seven countries. Visit www.ilog.com for additional information.

ILOG is a registered trademark of ILOG. ILOG Views and ILOG TGO are trademarks of ILOG. All other company and product names are trademarks or registered trademarks of their respective owners.