Press Release

Harmonic Announces Audio Webcast Presentation at the Kaufman Bros. Ninth Annual Investor Conference

September 1, 2006

SUNNYVALE, Calif.--(BUSINESS WIRE)--Sept. 1, 2006--Harmonic Inc. (Nasdaq:HLIT) today announced that Robin Dickson, Chief Financial Officer, will make a presentation at the Kaufman Bros. Ninth Annual Investor Conference on Thursday, September 7, 2006, at 12:05 P.M. (Eastern Time). The live audio webcast of Harmonic's presentation will be available from Harmonic's website, www.harmonicinc.com, under the Investor Relations Events section. The replay will be available after 5:00 P.M. (Pacific Time) on September 7 through September 14 at the same Web address.

About Harmonic Inc.

Harmonic Inc. is a leading provider of digital video, broadband optical networking and IP delivery systems to cable, satellite, telecom and broadcast network operators. Harmonic's open standards-based solutions for the headend through the last mile enable customers to develop new revenue sources and a competitive advantage by offering powerful interactive video, voice, and data services such as video-on-demand, high-definition digital television, telephony, and Internet access.

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.


    CONTACT: Harmonic Inc.
             Chief Financial Officer
             Robin N. Dickson, 408-542-2500
             or
             StreetConnect
             Investor Relations
             Michael Newman, 408-542-2760

    SOURCE: Harmonic Inc.