Press Release

Belgacom Deploys Redback Networks Platform for National Interactive Digital Television Service 

Belgium’s National Carrier Selects Redback’s SmartEdge Service Gateway platform for the Video-on-Demand Network Roll-out

SAN JOSE, Calif., December 13, 2005 – Redback Networks Inc. (NASDAQ: RBAK), a leading provider of next-generation IP broadband networking systems, today announced that, following extensive trials, its SmartEdge® Service Gateway has been selected by Belgacom as the platform to enable roll-out of iDTV (interactive Digital Television) Video-on-Demand service over Belgacom’s high-speed DSL network.

Since last summer, Belgacom has been making their TV over DSL service widely available. As from the start of the new season, Belgacom has secured the digital broadcasting rights for the national Jupiler Soccer League. Apart from exclusive soccer coverage and the availability of a complete suite of broadcast television channels, Belgacom TV also offers movies on demand, an interactive electronic TV guide and parental control options.

The deployment of the SmartEdge Service Gateway helps Belgacom to support higher bandwidth and advanced functions to integrate the video on demand service into the current data network. The high availability architecture of the SmartEdge product family enables Belgacom to achieve the high levels of availability required to support mission critical consumer applications. The SmartEdge platform’s support of hierarchical quality of service functions ensures a high quality and personalized user experience.

“IPTV services have captured the imagination of service providers both as a source of incremental revenue and a competitive defense against the cable companies,” said Magnus Almquist, Redback’s vice president of sales and operations for Europe, Middle-East and Africa. “We are pleased to be working with Belgacom on this exciting and innovative service offering.”

About Belgacom

Belgacom is the leading telecommunications company in Belgium and a market leader in a number of areas, including retail and wholesale fixed-line telephony services, mobile communications services and broadband data and Internet services. For the year ended 31 December 2004, the Group had total revenue of EUR 5,540 million and operating income before depreciation and amortization (excluding non-recurring items) of EUR 2,394 million.

About Redback Networks

Redback Networks Inc., a leading provider of next-generation broadband networking equipment, enables carriers and service providers to build Smart Broadband Networks that are personalized, adaptive and efficient. The Smart Broadband Network enables advanced IP based subscriber services to consumers, businesses and wholesale customers. The company's carrier-class, consumer-scale SmartEdge product family combines advanced subscriber management, carrier-class IP edge routing and highly scalable Ethernet aggregation functions. In conjunction with the NetOp™ Element and Policy Manager platforms the SmartEdge family provides a powerful and flexible infrastructure solution that enables delivery of next-generation Broadband IP services.

Founded in 1996 and headquartered in San Jose, Calif., with sales and technical support centers located worldwide, Redback Networks maintains a growing and global customer base of more than 500 carriers and service providers, including major local exchange carriers (LECs), inter-exchange carriers (IXCs), PTTs, service providers and ISPs. For more information, visit Redback Networks at www.redback.com.

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REDBACK and SmartEdge are trademarks registered at the U.S. Patent and Trademark Office and in other countries. NetOp is a trademark of Redback Networks Inc. All other products or services mentioned are the trademark, service marks, registered trademarks or registered service marks of their respective owners.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995

The statements contained in this press release that are not purely historical are forward-looking statements within the meaning of Section 21E of the Securities and Exchange Act of 1934, as amended, including statements regarding Redback Networks’ expectations, beliefs, intentions or strategies regarding the future and including, without limitation, statements regarding Belgacom’s deployment of Redback’s SmartEdge Service Gateway as the platform to enable iDTV Video-on-Demand service over Belgacom’s high-speed DSL network and whether the deployment of the SmartEdge Service Gateway will help Belgacom to support higher bandwidth and advanced functions to integrate the video on demand service into the current data network and whether the SmartEdge product family will enable Belgacom to achieve the high levels of availability required to support mission critical consumer applications and support of hierarchical quality of service functions to ensure high quality and personalized user experience. All forward-looking statements included in this document are based upon information available to Redback Networks as of the date hereof, and Redback Networks assumes no obligation to update any such forward-looking statements. Forward-looking statements involve risks and uncertainties, which could cause actual results to differ materially from those projected. These risks and other risks relating to Redback Networks’ business are set forth in the documents filed by Redback Networks with the Securities and Exchange Commission (SEC), specifically the most recent report on Form 10-K, Form 10-Q, Form 8-K, Redback’s Registration Statement on Form S-3 (File No. 333-114352), and amendments thereto, and the other reports filed from time to time with the SEC.