Germany's mediaWays Deploys Micromuse's Netcool Suite.

Business Editors & High Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--Sept. 4, 2002

Germany's 2nd-Largest ISP Utilizes Netcool(R)Solutions for

Reliable Service Delivery

Micromuse Inc. (Nasdaq: MUSE), the leading provider of service and business assurance software, today announced that mediaWays GmbH is deploying the Netcool(R) suite as the core management solution for its IT infrastructure.

Netcool solutions are helping provide end-to-end management of mediaWays' infrastructure, including provisioning for Internet service providers such as AOL Germany, AOL UK, Bertelsmann, Lycos, Daimler-Chrysler, RTL, Toyota, Telefonica, and Deutsche Bank.

"mediaWays currently provides the entire platform for 30 of Europe's largest ISPs, and we continue to experience rapid expansion in our subscriber base as the demand for hosting and application services booms," said Dr. Winfrid Meusel, Vice President Operations & Solutions, mediaWays. "In light of this growth, we needed to ensure that our networks meet customer requirements while providing the necessary capacity to support new business. Micromuse's Netcool solutions help our customers differentiate their services quickly and allow them to add value as they expand their offerings."

After a competitive analysis of the available technologies, mediaWays selected Micromuse's flagship Netcool/OMNIbus(TM) application to provide end-to-end management across its service delivery infrastructure. The Netcool solution consolidates faults from various networking devices, environments and equipment throughout mediaWays' 900 points of presence mainly in Germany and the UK, and consolidates these faults to present a realtime view of services to network operators.

"As one of Europe's leading Internet Service Providers, mediaWays supports millions of subscribers and through its local access partners they provide the infrastructure for many more," said Richard Lowe, Micromuse's Vice President Europe, Middle East & Africa. "The open architecture and off-the-shelf compatibility of Netcool provides for easy installation and integration, allowing mediaWays to add new network elements, systems and management tools as they continue to grow and expand services."

About mediaWays

mediaWays is the largest Internet Protocol (IP) network services provider in Germany, after Deutsche Telekom. As a leading provider of communication services for business clients, mediaWays develops highly complex corporate solutions such as IP VPNs and hosting services that are designed to exacting scalability and security standards. With the highest online minute count in Germany, the company has secured the pole position among the alternative carriers. mediaWays also owns and operates its Germany-wide IP backbone and data centres. Some of Germany's largest hosting services such as the RTL server farm are operated, administrated and supported from the mediaWays computer centres. 30 of Germany's most prevalent online services run through the mediaWays platform. Furthermore mediaWays develops full communication solutions for international groups with the global corporate network of Bertelsmann AG amongst them. Other clients are AOL, DaimlerChrysler, Toyota, Deutsche Bank, RWE or Lycos. The mediaWays Group - founded in 1996 - includes mediaWays GmbH with its headquarters in Gutersloh and mediaWays.uk Ltd. with its headquarters in London. Overall mediaWays has presence in 16 locations in Germany and the UK. International business services are developed in cooperation with its parent company: Telefonica Data.

About the Netcool Suite

Micromuse's Netcool(R) software suite provides businesses with the assurance that their networks, services and applications are working. By allowing our customers to see what's happening throughout the infrastructure in realtime, Netcool applications enable them to respond to problems before they cause network-based business services to go down.

Netcool suite applications install out-of-the-box, deploy rapidly and scale as networks grow. Micromuse's flagship, Netcool/OMNIbus(TM) application, includes a library of off-the-shelf software modules that allow our customers to collect and consolidate fault information from more than 300 popular environments spanning voice and IP, cable/broadband, switches and routers, and enterprise management systems.

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of service and business assurance software. Micromuse's recent list of awards include the Crossroads A-List Award for Best IP Network Diagnosis Product for the Netcool(R)/Visionary(TM) application. In addition, Micromuse was recently recognized in the Forbes 500, Bloomberg's Tech 100, the Barron's 500, the Business Week Info Tech 100, Deloitte & Touche's Technology Fast 500, the San Francisco Chronicle 500 and Network World's NW200. Micromuse customers include AT&T, BT, Cable & Wireless, Cellular One, Charles Schwab, Deutsche Telekom, Digex, EarthLink, GE Appliances, ITC^DeltaCom, J.P. Morgan Chase, T-Mobile and Verizon. Headquarters are located at 139 Townsend Street, San Francisco, Calif. 94107; [phone]. The Web site is at www.micromuse.com.

Micromuse and Netcool are registered trademarks of Micromuse Ltd. All other trademarks and registered trademarks in this document are the properties of their respective owners. Any statements contained in this press release that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Any forward-looking statements contained herein are based on current expectations, but are subject to a number of risks and uncertainties.

The factors that could cause actual future results to differ materially from the forward-looking statements include the following: fluctuations in customer demand, the Company's ability to manage its growth (including the ability to hire sufficient sales and technical personnel), the risks associated with the expansion of the Company's distribution channels, the risk of new product introductions and customer acceptance of new products; the rapid technological change which characterizes the Company's markets, the risks associated with competition, the risks associated with international sales as the Company expands its markets, and the ability of the Company to compete successfully in the future, as well as other risks identified in the Company's Securities and Exchange Commission Filings, including but not limited to those appearing under the caption "Risk Factors" in the Company's most recent Quarterly Reports on Form 10-Q and on Form 10-K on file with the Securities and Exchange Commission and available on the Company's Web site.