Press Release

Indonusa Telemedia Offers Superior Picture Quality for DTH MPEG-2

Service Using DiviCom(R) Electra(TM) Encoders and ProStream(TM) 1000

                       Stream Processing System

SUNNYVALE, Calif.--(BUSINESS WIRE)--Sept. 4, 2007--Harmonic Inc. (NASDAQ:HLIT) today announced that PT Indonusa Telemedia has implemented Harmonic's DiviCom(R) Electra(TM) 1000 multi-channel MPEG-2 standard definition (SD) encoders for its Telkom Vision direct-to-home (DTH) satellite service in Indonesia. The solution deployed by Indonusa Telemedia also includes the ProStream(TM) 1000 stream processing platform with ProCipher(TM) scrambling technology used for both multiplexing and encryption, as well as NMX Digital Service Manager(TM) for end-to-end monitoring and control of the video service. With this deployment, Harmonic continues to expand its market position and leadership in delivering IP-based digital video solutions to service providers in the Asia Pacific region.

When planning its DTH service upgrade, Indonusa Telemedia was looking for a video headend infrastructure that would support the operator's ability to offer consumers an affordable and high quality service that can be easily expanded over time. Indonusa Telemedia is a subsidiary of Telkom Indonesia Group, the nation's largest telecom operator offering voice, data and video triple play services.

"Our goal is to be at the forefront of a new era in pay TV in Indonesia," said Rahadi Arsyad, President Director/CEO for PT Indonusa Telemedia. "Harmonic's high density and superior quality Electra MPEG-2 encoders enabled us to maximize the number of channels per transponder for the Telkom Vision DTH service. As a highly respected leader in video solutions, Harmonic brings experience and the best compression solutions in the industry, meeting our needs for reliability, scalability and performance."

"Harmonic is focused on developing optimal solutions for high definition and standard definition video delivery and continues to lead the way in compression enhancements for both MPEG-4 AVC and MPEG-2 formats," said Raymond Tse, Vice President of Asia Pacific Sales for Harmonic Inc. "The IP-based digital video headend implemented by PT Indonusa Telemedia for the Telkom Vision service not only allows them to increase channel capacity with the low bit-rate Electra 1000 encoders, but also provides a flexible platform that can be easily expanded as the service grows."

Harmonic's Electra product line also includes market-leading MPEG-4 AVC (H.264) compression platforms--the Electra 7000 HD encoder and Electra 5400 SD encoder. These multi-service systems deliver superior picture quality for up to four full resolution channels with simultaneous low resolution output for applications such as picture-in-picture or multi-channel mosaics in a compact 1-RU form factor. Harmonic's digital video solutions are today deployed by the world's leading cable, satellite, telco and terrestrial service providers to power their broadcast and on-demand video services.

About PT Indonusa Telemedia

PT Indonusa Telemedia, with its trademark, Telkomvision, is a subsidiary company of Telkom Indonesia Group. Delivering Pay Television services through TV Satellite (DTH) and Digital Cable TV, PT Indonusa Telemedia is determined to reach its target of 120,000 subscribers by year end 2007 and one million subscribers by 2010.

After a recent restructuring of the management team, PT Indonusa Telemedia has relaunched its DTH platform and is aggressively upgrading the existing analog HFC cable to a digital platform. In addition, utilizing the synergy of Telkom's fixed line infrastructure, the company is implementing an IPTV services plan before the end of this year.

About Harmonic Inc.

Harmonic Inc. is a leading provider of versatile and high performance video solutions that enable service providers to efficiently deliver the next generation of broadcast and on-demand services including high definition, video-on-demand, network personal video recording and time-shifted TV. Cable, satellite, broadcast and telecom service providers can increase revenues and lower operational expenditures by using Harmonic's digital video, broadband optical access and software solutions to offer consumers the compelling and personalized viewing experience that is driving the business models of the future.

Harmonic (NASDAQ:HLIT) is headquartered in Sunnyvale, California with R&D, sales and system integration centers worldwide. The Company's customers, including many of the world's largest communications providers, deliver services in virtually every country. Visit www.harmonicinc.com for more information.

This press release contains forward-looking statements within the meaning of Section 27(A) of the Securities Act of 1933 and Section 21(E) of the Securities Exchange Act of 1934, including statements related to: a flexible platform that can be easily expanded as the service grows.

Our expectations and beliefs regarding these matters may not materialize, and actual results could differ materially from those projected. The forward-looking statements contained in this press release are also subject to other risks and uncertainties, including those more fully described in Harmonic's filings with the Securities and Exchange Commission including its recent Reports filed on Form 10-K and Form 10-Q. Harmonic does not undertake to update any forward-looking statements.

EDITOR'S NOTE - Product and company names used herein are trademarks or registered trademarks of their respective owners.

    CONTACT: Harmonic
             Sarah Lum, +1-408-543-2392 (Media Relations)
             sarah.lum@harmonicinc.com
             or
             StreetConnect for Harmonic
             Michael Newman, +1-408-542-2760 (Investor Relations)
             hlit@stct.com

    SOURCE: Harmonic Inc.