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TDS Telecom Secures Network with NetScreen Security Solutions

Sunnyvale, CA - February 3, 2004 - NetScreen Technologies, Inc. (Nasdaq: NSCN) today announced that TDS Telecom, a national phone services company, has deployed NetScreen’s network security solutions and intrusion detection and prevention (IDP) systems to secure its network and protect critical customer data.

Prior to implementing NetScreen solutions, TDS Telecom used a multi-OS software-based firewall solution that relied upon a third-party solution to provide High Availability (HA) capabilities. Faced with upgrade complexities, performance and scalability limitations as well as a mounting need to protect customers’ critical data with more advanced security capabilities, TDS Telecom replaced its previous network security products with NetScreen’s hardware-based, purpose-built integrated firewall and virtual private network (VPN) security appliances and systems as well as NetScreen’s IDP products.

TDS Telecom has seen many benefits, including increased network security and performance, since using the NetScreen solution. A simplified upgrade process and management also have helped TDS Telecom increase employee productivity and save time and money.

“We originally selected NetScreen because we knew the performance was greater than our previous solution. We had no idea we’d be seeing so many other great benefits,” said Matthew Gruett, Internet systems specialist at TDS Telecom.

To provide firewall protection of TDS Telecom’s critical data resources, NetScreen-500 systems, purpose-built, hardware-based devices that integrate firewall, VPN and traffic management functionality, are installed in HA mode. Two NetScreen-208 and four NetScreen-204 appliances are deployed in active/passive mode and provide additional layers of protection. NetScreen-204 appliances also are being used to secure a virtual messaging application combining text messaging, fax and voicemail.

Two NetScreen-IDP 500 systems, which provide up to 500 Mbps throughput and operate in-line to accurately detect and drop malicious traffic in real-time before it reaches its victim, are deployed in active/passive mode at TDS Telecom’s headquarters.

Additionally, NetScreen-5XT and -5XP appliances provide a cost-effective solution for TDS Telecom’s remote site offices.

For more information about NetScreen products, visit: http://www.netscreen.com/products/index.jsp.

About TDS Telecom

TDS Telecom, a growing national company, brings high quality, locally based telecommunications services to 900 rural and suburban communities across the U.S. Headquartered in Madison, Wis., the company, along with its subsidiaries TDS Metrocom and USLink, services more than one million access line equivalents. TDS Telecom can be accessed through the Internet at www.tdstelecom.com.

TDS Telecom is part of the Telephone and Data Systems, Inc. (AMEX: TDS) family of companies. TDS is a diversified telecommunications corporation founded in 1969. Through its strategic business units, U.S. Cellular (AMEX: USM) and TDS Telecom, TDS operates primarily by providing wireless and local telephone service. The company currently employs approximately 11,100 people and serves more than five million customers in 34 states.

About NetScreen Technologies

NetScreen Technologies, Inc., is a leading developer of network security and access solutions for enterprises and carriers worldwide. NetScreen's solutions offer customers multiple layers of network and application-level protection in purpose-built appliances and systems that optimize performance and reduce total operating costs. NetScreen is located at 805 11th Ave., Sunnyvale, Calif., 94089. More information on NetScreen's products can be found at http://www.netscreen.com or by calling toll free at 1-800-638-8296.

NetScreen and the NetScreen logo are trademarks of NetScreen Technologies, Inc. in the United States and other countries. Other trademarks are the property of their respective owners.

This press release contains forward-looking statements about events and circumstances that have not yet occurred. For example, words such as “will”, “can”, “provides”, “enabling”, “designed”, “allows” and “continues”, or other statements in the future tense, are forward-looking statements. Actual outcomes and results may differ materially from expectations in this press release due to a number of risks and uncertainties. Such risks and uncertainties include whether the market for security products will grow as projected, if at all, whether demand for NetScreen products will continue, whether new products if and when introduced, will be successful and whether products will perform as expected.