New Zealand's TelstraClear Deploys Netcool Solution.

Business Editors/High-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--Nov. 11, 2002

End-to-End Management Solution Providing Cross-Domain Network and

Service Management; Assuring Uptime of Voice, Data and Internet

Services

Micromuse Inc. (Nasdaq: MUSE), the leading provider of service and business assurance software, today announced that the Netcool(R) solution has been deployed at TelstraClear - New Zealand's leading communications provider.

The Netcool solution helps ensure the uptime of network services at TelstraClear. As New Zealand's second-largest full service communications company, TelstraClear provides innovative market leading communication solutions to business, government, wholesale and residential sectors through a customer focused business.

"The ability of the solution to consolidate the management of multiple services and infrastructure platforms was critical to our selection of Netcool," said William Lee, Manager, Network Operations at TelstraClear. "The overall deployment is extremely scaleable, allowing us to maintain service uptime while adding new customers and new services. In addition, it provides service assurance of all of our network services."

The primary TelstraClear business operations supported by Netcool are IP data, voice, pay -television and managed services. The Netcool solution consolidates the management of faults from a variety of service domains, enabling TelstraClear's network operations center (NOC), network support services (NSS) and regional operations teams to respond to problems before they cause service outages. Equipment monitored by Netcool includes network infrastructure from Juniper/Unisphere, Cisco, Foundry, Shasta and Extreme; Nortel DMS voice switches; CTI equipment from Alcatel and Genesys; ATM gear from Cisco; DWDM gear from Nortel, SDH gear from Nortel and Alcatel; Spread-Spectrum Radio from Marconi; PDH equipment from Nokia; and a range of other SNMP and non-SNMP based integrations.

Further, TelstraClear has selected to deploy a Clarify/Amdocs gateway for the integration of trouble management, and a GE Network Systems Data Source Adapter for the integration of network and service repositories (for network and service impact analysis and reporting).

Datacraft, a leading systems integrator in the Asia-Pacific region and an Authorized Micromuse reseller, was responsible for licensing the Netcool software to TelstraClear. DataCraft New Zealand was also instrumental in the implementation of the Netcool suite across TelstraClear's network, with architecture and design collaborated by TelstraClear, Datacraft and the regional Micromuse teams. TelstraClear named the solution the "i-NSM," an acronym for the "integrated - Network and Service Management system."

About TelstraClear

Created from the integration of TelstraSaturn Limited and CLEAR Communications Ltd in December 2001, TelstraClear is New Zealand's leading communications challenger providing choice in the New Zealand market and seamless services to trans-Tasman customers. The company provides state-of-the-art broadband technology to deliver voice, high-speed data, mobile, wireless and Internet services and cable TV to business and consumers through a customer-focused business.

About Micromuse

Micromuse Inc. (Nasdaq: MUSE) is the leading provider of service and business assurance software solutions. The Netcool(R) software suite provides organization 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 AT&T, BT, Cable & Wireless, 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.