Scientific-Atlanta Joins Micromuse Developers Alliance.

Business Editors/Hi Tech Writers

SAN FRANCISCO & ATLANTA (BUSINESS WIRE)--Dec. 27, 2000--

Integrated Solution Will Allow

Broadband Access Service Providers to Offer Realtime Service

Monitoring of Physical Cable Plants

Micromuse Inc. (Nasdaq: MUSE), the leading provider of realtime fault management and service assurance software, today announced that Scientific-Atlanta, Inc. (NYSE: SFA), a leading supplier of transmission networks, digital interactive set-tops and subscriber systems designed for video, high-speed Internet, and voice-over-IP (VoIP) networks, has joined the Micromuse Developer's Alliance(TM). Scientific-Atlanta has licensed the Netcool/Software Developers Kit(TM) (Netcool/SDK) from Micromuse to create a Netcool Ready(TM) version of its Transmission Network Control System (TNCS) software for broadband networks.

Through the integration of TNCS, Netcool suite applications will provide realtime monitoring for physical cable plants, supporting hybrid fiber/coax (HFC) networks. This will provide network operators much greater visibility into their plant, and may allow them to reduce costs associated with isolating problems. The integration will allow network operations centers to monitor network faults, and minimizes the need to send repair technicians directly to customer homes.

"Scientific-Atlanta's alliance with Micromuse will help operators further automate support procedures and contribute to decreased truck rolls," said Paul Connolly, Vice President of Marketing & Network Architectures for Scientific-Atlanta. "For network operators, this management application will help them to identify network problems quickly, and in some cases before a problem actually occurs, and thereby increase subscriber satisfaction and loyalty."

The Netcool suite collect faults and network management information from a wide range of headend, optical and digital transport equipment. The integration of TNCS adds the ability to monitor a complete range of Scientific-Atlanta's transmission products including Continuum(R) Headend Systems, Prisma(R) Optical Networks, and Prisma DT Digital Transport. Consolidating this information within the Netcool console and coupling it with other information collected from the network gives cable operators a holistic view into the realtime availability and status of their entire network.

"Scientific-Atlanta is the market leader in transmission networks for broadband access and we are delighted that they have joined the Micromuse Developers Alliance," said Lou Steinberg, Micromuse's Senior Vice President, Marketing & Market Development. "From high-speed Internet, voice over IP (VoIP), and video on demand (VOD) networks, the coupling of our technologies will help MSOs manage their growing customer base and scale their networks, enabling them to save time and money while preparing them for the upcoming challenges in the broadband access market."

The Micromuse Developers Alliance provides Micromuse and its alliance members with the resources to cooperatively pursue business, technical and marketing opportunities. Already a significant number of vendors have expressed interest in Micromuse's Developers Alliance Program to develop and provide off-the-shelf integrated solutions for mutual customers. Toward that end, Micromuse actively enlists best-in-class solutions providers offering applications complementary to Netcool. Micromuse provides its approved Netcool Ready partners with the Netcool/SDK. Provided in CD-ROM format, the Netcool/SDK provides the tools necessary to develop Netcool Probes, Gateways and Data Source Adapters.

About TNCS

Transmission Network Control System (TNCS) is a comprehensive element management system that provides centralized end-to-end monitoring and control of broadband transmission networks. TNCS is a combination of software and hardware components that provide status monitoring and management of head-end, hub, and HFC plant-deployed equipment. The primary objectives of TNCS are to minimize downtime and to increase broadband network reliability.

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 suite allows service providers to expand their networks as their markets grow.

About Micromuse

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

Prisma and the Scientific-Atlanta logo are registered trademarks of Scientific-Atlanta, Inc.

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.