Press Release

Harmonic Announces Third Quarter 2006 Reporting Date

October 10, 2006

SUNNYVALE, Calif.--(BUSINESS WIRE)--Oct. 10, 2006--Harmonic Inc. (NASDAQ:HLIT) today announced that it plans to report its results for the third quarter of 2006 after market close on October 25, 2006.

Harmonic will host a conference call to discuss its financial results at 2:00 P.M. Pacific (5:00 P.M. Eastern) on October 25, 2006. A listen-only broadcast of the conference call can be accessed on the Company's website at www.harmonicinc.com or by calling +1.617.597.5363 (participant code 17518057). The replay will be available after 5:00 P.M. Pacific at the same website address or by calling +1.617.801.6888 (participant code 67913915).

Harmonic intends to discuss financial and other statistical information on this conference call. This information will also be available on the Company's website at www.harmonicinc.com either in the press release related to the above broadcast, by accessing the listen-only broadcast described above or by accessing the replay of the broadcast described above.

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.
             Robin N. Dickson, Chief Financial Officer,
             +1-408-542-2500
             or
             StreetConnect
             Investor Relations
             Michael Newman, +1-408-542-2760

    SOURCE: Harmonic Inc.