Harmonic Announces CyberStream IPG 8000.

AMSTERDAM, the Netherlands--(BUSINESS WIRE)--Sept. 10, 1999--

IP Data Encapsulator Module Extends TRANsend(TM) Product Line

Enabling New Services for Cable, Wireless and Satellite Providers

Harmonic Inc. (Nasdaq:HLIT) today announced the latest module in the TRANsend(TM) product line, the CyberStream(TM) IPG 8000. As the first TRANsend product leveraging technology from the Harmonic subsidiary, Harmonic Data Systems, the IPG 8000 enables seamless integration of Internet data services into any cable, satellite or wireless TV communication system. The CyberStream 8000 supports Harmonic's strategy to bring broadband delivery capabilities to cable, satellite and wireless providers.

The CyberStream IPG 8000 belongs to a new generation of IP information products, designed to seamlessly integrate IP capabilities into existing MPEG-2 video networks, such as HFC, satellite or wireless. With this new IP technology, operators can now deliver services such as fast Internet and Intranet access; broadband Internet backbone connections; virtual private networks (VPN); rich content delivery; and multicasting and push services to expand their range of solutions.

Up to ten CyberStream IPG 8000 modules fit into each TRANsend VTP 8000 platform, feeding up to ten transponders or QAM channels. When the CyberStream IPG 8000 operates in conjunction with video modules, TRANsend offers a scalable data and video solution, enabling operators to extend and customize their services regardless of transport infrastructure.

"With many operators moving into the satellite, wireless and cable market, it is becoming more complex," said Patrick Harshman, Director, Product Line Management, Digital Systems, for Harmonic Inc. "The CyberStream IPG 8000 is designed to meet the needs of service providers offering advanced IP services along with video and audio. We can now offer a new solution to multiplex IP and video traffic to enable all providers to offer an enhanced range of services to their customers."

The CyberStream IPG 8000 is a fully standards-based transport-carrying TCP/IP and UDP/IP. In addition, it is a fully Digital Video Broadcast (DVB)/MPE compliant end-to-end system, including receive elements for both consumers and corporations. For network operators, the CyberStream IPG 8000 is SNMP-based and leverages the TRANsend manageability via the NETWatch(TM) Element Management System for the TRANsend platform. This enables comprehensive management and control of all modules in one easy-to-use application.

About TRANsend

Harmonic's TRANsend digital headend is comprised of several components, including MPEG-2 encoders and multiplexers, MPEG-2 content receivers, and the video transmission platform that serves as the headend's building block. The compact and integrated headend can be flexibly configured to operators' individual needs via Harmonic's NETWatch(TM) Element Management System. The TRANsend digital products are compatible with all relevant worldwide and domestic standards, including ITU/SCTE (International Telecommunications Union/Society of Telecommunications Engineers), DVB (Digital Video Broadcast) and DAVIC (Digital Audio Video International Communication).

About Harmonic Inc.

Harmonic Inc. designs, manufactures and markets digital and fiber optic systems that deliver video, voice and data over cable, satellite and wireless networks. These advanced solutions enable cable television and other network operators to provide a range of interactive broadband services that include high-speed Internet access, telephony and video-on-demand. Harmonic is headquartered in Sunnyvale, Calif., where it also operates an R&D center and a manufacturing facility, and has a sales and support center in the U.K. and a sales office in Belgium. The company also operates its Harmonic Data Systems subsidiary and an R&D center in Israel. In addition, the company maintains several sales and support centers worldwide. Harmonic is ISO 9001-certified and its stock is traded on the Nasdaq stock market under the symbol "HLIT." For more information, check the company's website at www.harmonicinc.com.

This press release contains forward-looking statements, including, but not limited to, the features and benefits of the CyberStream IPG 8000, within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Actual results could differ materially from those projected in the forward-looking statements as a result of the risk factors set forth in documents that Harmonic files with the SEC, specifically reports on Form 10-K and 10-Q.

Editors' Note: Product and company names used here are trademarks

or registered trademarks of their respective companies.