Press Release

    Satellite Transmission Operator Adds New Transport Powered by
    DiviCom(R) Electra(TM) Encoders and DiviTrackIP(TM) Statistical
                             Multiplexing

SUNNYVALE, Calif.--(BUSINESS WIRE)--July 12, 2007--Harmonic Inc. (NASDAQ:HLIT) today announced that SatLink Communications Ltd., a leading teleport based in Israel, has expanded its channel capacity with a new transport using Harmonic's DiviCom(R) Electra(TM) 1000 multi-channel MPEG-2 encoders, the ProStream(TM) 1000 with DiviTrackIP(TM) statistical multiplexing and NMX Digital Service Manager(TM). The highly bandwidth-efficient Harmonic solution deployed for the new video service increases the number of channels that can be delivered while also providing viewers with superior picture quality. SatLink provides world-class global content distribution services to content providers, broadcasters and governments, including satellite downlink, uplink, turnaround, fiber and IP transmission services, and is backed by shareholders including the Eurocom Group, Barak013 and Globecast.

As the demand for a greater variety of video programming and services continues to grow, satellite operators around the world are investing in Harmonic's integrated and versatile video headend solutions, including the high performance Electra family of standard definition (SD) and high definition (HD) MPEG-2 and MPEG-4 AVC (H.264) IP-based compression systems. DiviTrackIP -- an innovative solution for maximizing bandwidth efficiency in a distributed environment -- is the world's first IP-based statistical multiplexing solution, now in use to deliver thousands of channels worldwide.

"Only with the latest generation solutions has SatLink felt comfortable providing statistical multiplexed services in order to maximize bandwidth utilization for our clients' channels and we are very pleased to launch our first such system using Harmonic's equipment," said David Hochner, CEO of SatLink Communications. "At SatLink we have a reputation for providing our clients with the highest quality service and the implementation of this new system is in line with our world-class service policy."

"SatLink's service expansion is indicative of the increasing consumer demand for more diversity in video programming," said Nimrod Ben-Natan, Vice President of Products and Strategy for Harmonic Inc. "To meet this need, satellite operators like SatLink need flexible variable bit-rate systems that enable them to maximize the number of channels per transponder. The combination of the Electra multi-channel encoders and DiviTrackIP offers a highly cost-effective solution that makes it possible for SatLink to enhance their business by provisioning a greater range of broadcast channels."

Harmonic is focused on creating and delivering high value digital video solutions to satellite, cable, telco and terrestrial operators around the world. Top tier satellite operators in North America, Europe and Asia Pacific today use the latest generation of Harmonic's H.264 and MPEG-2 systems for their video services.

About SatLink Communications, Ltd.

SatLink is recognized as a pioneer in global satellite communications services. It is a leading provider of transmission solutions for Global Content Distribution over Satellite Platforms, Fiber and IP. SatLink's services include Uplink, Downlink and Turn Around, Channel Management, SNG & Fly Away, Hub Hosting, Video Monitoring and IPTV. Strategically located in the heart of the Middle East, SatLink provides access to a worldwide network covering 5 continents and has been providing its clients with flexible and cost-effective transmission solutions for close to two decades. SatLink operates a range of MCPC platforms including the popular Hot Bird, AsiaSat2, Hellas Sat, NSS6 and more. For more information, please visit www.satlink.tv.

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: demand for a greater variety of video programming and services continuing to grow and increasing consumer demand for more diversity in video programming.

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)
             mnewman@stct.com

    SOURCE: Harmonic Inc.