Accelerated Networks Named Major Supplier to Siemens' Comprehensive, Last-Mile Broadband Solution for Winstar.

Business Editors/Technology Writers

MOORPARK, Calif.--(BUSINESS WIRE)--Dec. 15, 2000

U.S. Multi-City Deployment Includes Next-Generation Packet-Based

Solutions for Multiservice over Broadband Access (MSBA)

Accelerated Networks (Nasdaq:ACCL) today announced that it has been named a major supplier in a $150 million, end-to-end, broadband equipment and service contract awarded to Siemens Carrier Networks LLC by Winstar Communications (Nasdaq:WCII), a leading broadband services company.

According to Siemens and Winstar, the contract calls for the deployment of Siemens' Quickstream(TM) solution, including Accelerated's complete multi-tenant unit (MTU) multiservice solution in markets across the United States over two years.

Accelerated Networks provides a comprehensive last-mile solution through its ATM-based, multiservice, in-building network platform. Accelerated's voice gateways enable connectivity to Class 5 switches and its MTU concentrators facilitate connectivity within the building, and between NxT1, DS-3 or OC-3 wireless systems.

Additionally, Accelerated's range of carrier-class integrated access devices (IADs) utilize DSL interfaces and provide voice, data and security services to business subscribers on Winstar's end-to-end broadband network.

"In deploying our last-mile broadband infrastructure, Winstar is committed to selecting the technology solutions that best meet the broadband needs of our customers," said David Ackerman, group executive, Winstar Network and Systems services.

"Siemens' Quickstream, which includes Accelerated's in-building platform, gives us another tool in our network portfolio and fundamentally supports our strategy of partnering with market leaders to deploy best-of-breed equipment and technology.

"With this converged network architecture in place, on-net customers in small- and mid-sized buildings will immediately benefit from the increased efficiency and reliability that this solution provides."

"We are excited about partnering with Siemens to help Winstar further extend its innovative broadband services in-building," added Suresh Nihalani, chief executive officer of Accelerated Networks. "We believe Winstar is a clear example of a service provider that is successfully implementing a cost-effective and efficient multiservice over broadband delivery model for the point-to-multipoint wireless MTU market."

"Siemens' Quickstream solution is a revenue-ready solution that delivers high-speed multimedia applications to the desktop quickly and reliably," said Eve Aretakis, president for the Carrier Networks of Siemens Information and Communications Networks Inc. "This solution supports the mega-trend towards mobile business and enables companies the flexibility to respond quickly and efficiently as their needs evolve."

Specific Accelerated products utilized within Siemens' Quickstream solution include the AN-3220 MSAP broadband voice gateway, the AN-3204 MSAP MTU concentrator and the AN-24, AN-28, AN-30 integrated access devices.

About Accelerated Networks

Accelerated Networks, with headquarters in Moorpark, is a market leader in multiservice broadband access (MSBA) products that enable telecommunications service providers to bundle voice and data services over a single broadband access network.

These products are designed to allow service providers to efficiently and cost-effectively deliver and manage secure multiservice broadband access services using DSL, T1/E1, NxT1/E1 or DS3/OC-3 technologies.

Accelerated's products also allow service providers to leverage emerging technologies such as voice over broadband (VoB) and frame relay over DSL (FRoDSL) over a single broadband access network.

Accelerated Networks offers all of the components of a complete multiservice broadband access solution: carrier-class voice gateways, central office and multi-tenant unit concentrators and a broad range of customer premises integrated access devices (IADs). For additional information, visit www.acceleratednetworks.com.

About Winstar

Winstar is a leading broadband services company. The company is rapidly building one of the world's most widely available, end-to-end broadband networks. Winstar makes this network important and useful to businesses by providing a comprehensive set of high-quality, digital-age broadband services.

These services include high-speed Internet and data, Web hosting and design, phone services, Web-based applications, e-commerce, professional services and Office.com(R), A Service From Winstar, the top-ranked online business service for small- and medium-sized businesses. For more information, visit www.winstar.com.

About Siemens Information and Communication Networks

Siemens Information and Communication Networks Inc. is part of Siemens AG, one of the world's largest electrical engineering and electronics companies. Siemens AG, with headquarters in Berlin and Munich, Germany, is a leading global electrical engineering and electronics company, employing more than 447,000 people in 193 countries, with sales in excess of $82 billion worldwide in fiscal 2000.

The United States is the largest market for Siemens globally. In the United States, Siemens employs more than 73,000 employees and achieved sales of more than $18.1 billion in fiscal 2000. Siemens' U.S. businesses are leaders in the information and communication, healthcare, energy, industry, financial services, transportation and lighting sectors.

Based in Boca Raton, Fla., Siemens Information and Communication Networks, with its subsidiaries Siemens Carrier Networks LLC, Siemens Enterprise Networks LLC and Optisphere Networks Inc., is a leading provider of integrated voice and data networks and solutions for enterprises, carriers and service providers.

Portions of this news release contain forward-looking statements regarding future events or the future performance of the company. Forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from the results indicated by such statements. These factors include, but are not limited to, general market conditions affecting telecommunication service providers' purchase of equipment, in particular DSL-related equipment, changes in service providers' business models, the rate the company's customers deploy their networks, the company's customers' ability to secure financing, the timing of orders and shipments of the company's products, mix of products sold, changes in the prices of its components, ability to maintain production volumes and secure key components and the company's ability to develop new products to meet market demand. The company undertakes no obligation to publicly update any forward-looking statements whether as a result of new information, future events or otherwise. The company refers you to the documents it files from time to time with the Securities and Exchange Commission, specifically the company's Registration Statement on Form S-1 filed in connection with its initial public offering and its quarterly report filed on Form 10Q filed on Nov. 14, 2000. These documents contain and identify important factors that could cause actual results to differ materially from those contained in any forward-looking statements.

Note to editors: Siemens is a registered trademark of Siemens AG. Quickstream is a trademark of Siemens Information and Communication Networks Inc. For more information, visit the company's Web site at http://www.icn.siemens.com. For Siemens product information, call 800/814-1680.