Amena Selects Micromuse's Netcool Software.

Business Editors

SAN FRANCISCO--(BUSINESS WIRE)--Nov. 30, 2000

NETCOOL/OMNIbus(TM)to Manage One of Spain's

Leading Mobile Phone Services Network

Micromuse Inc. (Nasdaq: MUSE), the leading provider of fault and service-level management software, today announced that Amena has selected the Netcool(R) suite of applications to provide a complete network monitoring platform for its mobile phone and Internet service offerings. Amena was the first service provider in Spain to offer mobile phone services, including Wireless Applications Protocol (WAP), and currently delivers services to more than 3.25 million business and domestic customers.

After a thorough analysis of available technologies, Amena selected Netcool/OMNIbus(TM), Micromuse's flagship application, to help increase uptime and service quality of its mobile phone services and to optimize the use of resources in its Madrid-based network operations center. Netcool/OMNIbus, Micromuse's flagship application, will provide realtime end-to-end monitoring of Amena's network infrastructure, including servers, switches and routers, load balancing equipment and firewalls. In addition, the Netcool suite will correlate and consolidate event information from across Amena's infrastructure, providing a highly integrated management view of its network systems, helping network operators to ensure the availability of services.

"The mobile market in Spain is highly competitive and Amena must be state-of-the-art in how it manages its services," said Esther Morales, Amena's Support Systems Manager. "We need a solution that can be put in place very quickly and is easy to use and expand. The Netcool suite is a comprehensive package that suits our needs perfectly."

Amena also selected Netcool/Internet Service Monitors(TM) (Netcool/ISMs) to provide realtime Internet service availability and response time information for 18 different Internet protocols and applications by regularly testing each service at user-defined intervals. Netcool/ISMs are designed to be robust and highly scalable, enabling service providers and corporations to significantly improve the manageability of their

Internet connections, corporate intranets, and extranets. The data provided by Netcool/ISMs can be easily graphed against pre-defined service-level metrics to allow Amena to provide realtime and historical evidence of service-levels. Because it is scalable and deploys rapidly, the Netcool suite allows service providers to expand their networks as their markets grow. Satec, Micromuse's authorized systems integrator in Spain will handle implementation and support of the Netcool suite for Amena.

"Rapidly growing customer-oriented wireless operators such as Amena can quickly capitalize on the off-the-shelf deployment and scalability of Netcool solutions," said Marianne Costigan, Micromuse's Director, Wireless Strategies. "It is exciting to be working with a fast-moving mobile operator like Amena, in one of Europe's most rapidly growing national mobile markets."

About the Netcool Suite

Micromuse's Netcool software suite collects management data from more than 250 management environments and network devices, including voice, data and Internet. Fault data is rapidly processed and filtered by the Netcool ObjectServer(TM), an in-memory database. The Netcool application allows operators to build views of service availability in realtime, helping them manage networks more efficiently. Because it is scalable and deploys rapidly, the Netcool business model allows service providers to expand their networks as their markets grow.

About Amena

Amena is the third mobile phone operator in Spain. Amena won the tender for Spain's third DCS 1800 license in June 1998, and signed a 25-year contract with the Spanish government the following month. Amena launched services in 10 cities in January 1999, and by October 2000 had already reached a volume of 3.25 million customers. In March 2000 Amena won one of Spain's UMTS licenses.

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of fault and service-level management software. Micromuse was named one of the Top 25 Best Performers in the Wall Street Journal's Shareholder Scoreboard, and has recently been recognized in the Forbes 500, Business Week's Info Tech 100,Bloomberg's Top 100 Stocks, Barron's 500, and the San Francisco Chronicle 500. Micromuse customers include AT&T, BT, Cable & Wireless, Cellular One, Charles Schwab, Deutsche Telekom, Digex, EarthLink, GTE, ITC DeltaCom, MCI Worldcom, NextLink, One2One, PSINet and a number of financial investment concerns. Headquarters are located at 139 Townsend Street, San Francisco, Calif. 94107; [phone]. The Web site is at www.micromuse.com.

Netcool and Micromuse are registered trademarks of Micromuse Inc. 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.