com hem Sweden Deploys Micromuse's Netcool Suite to Assure Excellence of Triple Play Service Offering; Netcool Solutions Provide Superior Service Quality and IT Management for Innovative Broadband Provider.

SAN FRANCISCO -- Micromuse Inc. (Nasdaq: MUSE), the leading provider of ultra-scalable, realtime business and service assurance software, today announced that com hem AB, a market-leading cable operator in Sweden, has implemented the Netcool(R) suite to provide enhanced availability and service management of its broadband infrastructure. com hem is Sweden's largest cable TV provider with approximately 1.4 million subscribers, and is one of Europe's largest cable operators.

"As a cable TV company, com hem's operations teams are tasked with monitoring and managing network information from fifteen different data sources in order to provide consistent, quality services for our customers," said Martin Kull, com hem's CTO. "As a triple play service provider, we are required to collect and consolidate infrastructure data from over twenty different type of network sources. Netcool solutions help us deliver consolidated operations management and provide the operations teams with realtime views of services. Further, the Netcool technology is helping us streamline our business so that service-affecting faults on the network are quickly reported to our customer services department so we can ensure the delivery of high-quality, data and video services to our customers."

com hem selected Micromuse's Netcool solutions to cost-efficiently deliver voice, video, broadband and television services. The Netcool solutions provide an end-to-end management and monitoring backbone that integrates quickly with disparate management systems and devices in the infrastructure to deliver a single effective management interface to systems maintenance staff. Netcool solutions quickly pinpoint the cause of problems and evaluate their business impact with root-cause analysis, fault isolation, and service level management. Additionally, the solution allows com hem to quickly and easily integrate and manage new services as customer requirements necessitate.

Teleca OSS, a Micromuse Channel resale partner, delivered the design and implementation of com hem's network and systems management infrastructure. Micromuse and Teleca collaborated closely to ensure the rapid implementation of the Netcool solutions and to deliver a management solution that provides com hem with a lower total cost of ownership and faster return on investment.

"Today's cable market is more competitive than ever. With Cable, DSL and Wireline companies all competing for the same customers, ensuring quality of service is critical," said Richard Lowe, Micromuse's Senior Vice President, Sales, Technical and Business Operations, EMEA. "Netcool solutions have been selected by more than 1,750 service providers and enterprises worldwide to managing complex network infrastructure and improving service quality, reliability and customer satisfaction."

About com hem AB

com hem delivers broadband services and TV-content to one third of all Swedish homes. Homes connected gain access to high-quality broadband services and the market's largest supply of TV-channels. com hem also provides landlords with interactive services for efficient information management, property maintenance and operations. From October 2004, com hem also offers fixed telephony services.

About Netcool

Micromuse's Netcool(R) software solutions provide businesses with the assurance that their applications and services are up and operating. By allowing our customers to see what's happening throughout the infrastructure in realtime, Netcool applications enable them to respond to problems before revenue-supporting services are affected. Netcool applications install out-of-the-box, deploy rapidly and scale to the largest environments. Micromuse's flagship, Netcool/OMNIbus(TM) application, includes a library of off-the-shelf software modules that allow our customers to collect and consolidate information from more than 1,000 environments spanning applications, systems, voice and IP, cable/broadband, switches and routers, and enterprise management systems.

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of ultra-scalable, realtime business and service assurance software solutions. The Netcool(R) software suite provides organizations with the assurance that their IT systems are supporting and driving profits 24 hours a day. Unlike traditional infrastructure management systems, Netcool solutions provide realtime end-to-end visibility and accurate troubleshooting from a business perspective. Such business intelligence allows organizations to respond to problems quickly, streamline workflow processes and improve business uptime. Micromuse customers include BT, Cable & Wireless, Deutsche Telekom, EarthLink, ITC DeltaCom, J.P. Morgan Chase, MCI, 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 we make are based on current expectations, and are subject to a number of risks and uncertainties. Actual results could differ materially.

Factors that could cause actual future results to differ materially from the forward-looking statements include: fluctuations in customer demand; the Company's ability to manage its growth (including the ability to hire sufficient sales and technical personnel); risks associated with the expansion of the Company's distribution channels; risk of new product introductions and customer acceptance of new products; rapid technological change which characterizes the Company's markets;

risks associated with competition; risks associated with international sales; and the ability of the Company to compete successfully in the future; as well as risks relating to pending litigation, the completed restatement of certain of our financial statements, and other matters appearing under the caption "Risk Factors" in the Company's most recent Quarterly Reports on Form 10-Q and Form 10-K filed with the SEC and available on the Company's website. The Company disclaims any obligation or intention to update or revise any forward-looking statements.