AimNet Solutions Selects Micromuse's Netcool/OMNIbus.

Business Editors, Hi-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--March 6, 2001

End-to-End Monitoring of AimNet's eBusiness Delivery

Infrastructure Helps Enable Service Uptime

Micromuse Inc. (Nasdaq: MUSE), the leading provider of realtime fault management and service assurance software, today announced that AimNet Solutions, a network infrastructure services provider, will utilize the Netcool(R)/OMNIbus(TM) suite as the core network monitoring component for end-to-end management of its client infrastructure. Based in Norwalk, Connecticut, AimNet Solutions delivers a full lifecycle of end-to-end WAN, LAN and information security solutions for e-business networks. AimNet selected Micromuse's flagship Netcool/OMNIbus application to help maintain the availability and reliability of its network-based services, including internetworking, information security, VPNs, and network computing services.

"The Netcool suite's open, flexible architecture enables us to monitor the networks of our current clients with the flexibility of adding many new ones plus thousands of devices as our company grows," said Laurence Cranwell, Senior Vice President, Managed Network Services, AimNet Solutions. "With its ability to monitor and collect event information from a multitude of environments in realtime, we are able to provide efficient, reliable and proactive network service to our clients, maximizing the return on their e-business networks and enhancing client satisfaction."

Following a competitive analysis of available technologies, AimNet selected the Netcool/OMNIbus application to collect and consolidate faults from diverse customer networks, which are managed by AimNet. The Netcool/OMNIbus application provides an integrated view of network infrastructures - including servers, switches and routers, load balancing equipment and firewalls. In addition, the software helps network administrators identify and address critical event anomalies before they result in application or service outages.

"We are pleased that AimNet is using the Netcool solution to enhance service uptime over its clients' advanced network infrastructures," said Adrian Rowland, Micromuse's Director, Internet Strategies. "As AimNet continues to invest in state-of-the-art equipment, the Netcool suite, with its open architecture and flexibility to collect data from diverse environments, can help ensure the delivery of added network services, impacting AimNet's return on investment and their client's bottom line."

Red Rock Technologies, L.L.C., an authorized Micromuse reseller, was responsible for licensing the Netcool(R) software to AimNet Solutions and instrumental in validating AimNet's Netcool global design to help allow advanced functionality across multiple data centers.

About the Netcool(R) Suite

Micromuse's Netcool(R) software suite collects management data from more than 300 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 suite helps operators to build views of service availability in realtime, helping them manage networks more efficiently. Because it is scalable and deploys rapidly, the Netcool suite helps service providers expand their networks as their markets grow.

About AimNet Solutions

AimNet Solutions (www.aimnetsolutions.com) is a network professional services and managed network services company that offers advanced, end-to-end LAN, WAN and Information Security capabilities uniquely positioned to help clients empower their e-business networks. The company has its headquarters in Norwalk, CT and has major operations in New England, the New York Metro area and the Southeast. For more information, please call [phone] or send an e-mail message to [e-mail].

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of realtime fault management and service assurance software. Micromuse has recently been recognized in the Forbes 500, Bloomberg's Top 100 Stocks, the Barron's 500, Deloitte & Touche's Technology Fast 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 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.