CHATSWORTH, Calif., April 25 /PRNewswire-FirstCall/ -- MRV COMMUNICATIONS, INC. , a leading provider of products and services for out-of- band networking, WDM and optical transport, metro Ethernet, fiber optic components, 10GE and other service aware networking products, today announced that Limelight Networks, Inc., (Tempe, AZ) has chosen MRV's LambdaDriver for its newly built, 10 Gigabit Ethernet Silicon Valley network supporting content delivery services from its Silicon Valley location.

Limelight Networks' industry-leading content delivery network ensures extremely fast global Internet delivery of rich, high-bandwidth media such as video, music, games and downloads, to audiences of any size with massively provisioned, globally located, content distribution centers. Limelight has virtualized its Silicon Valley content delivery location with a fiber optic ring that links multiple data centers throughout the region as an ultra-scalable delivery location not bound by the power, space or networking constraints of any individual data center.

The high-speed data network encompassing San Jose, San Francisco and Oakland is supported by MRV's LambdaDriver dense wave division multiplexing (DWDM) fiber optic transport system fitted with the company's 10 Gbps transponders. Limelight is currently deploying a 60 Gbps ring around the region, with the ability to spontaneously expand the network to 800 Gbps without the need for additional dark fiber. In addition, Limelight has standardized on MRV LambdaDriver systems for all new 10 Gbps DWDM networks domestically and internationally.

"Growing consumer demand for multimedia content and the continued creation of new and innovative content are driving the popularity of our CDN service platform -- driving our need for high performance networking with ultra-scalable capacity," said Nathan Raciborski, CTO, Limelight Networks. "We started using MRV, with our early CWDM networks. They've proven themselves -- so we're expanding our capacity utilizing their cost-effective and high-performance 10 Gigabit DWDM solution

"The LambdaDriver platform offers the performance, flexibility and cost-effectiveness for a wide range of service providers that are building metropolitan networks and the success we have had with Limelight is a great testimony to that," said Noam Lotan, MRV President and CEO.

As new technologies and equipment evolve and abound, businesses and service providers must respond to growing traffic and service requirements while reducing power consumption, size and overall cost. MRV's LambdaDriver modular series delivers maximized bandwidth and service flexibility of networks.

The LambdaDriver can operate as a SONET/SDH transport device, CWDM or DWDM fiber optic transport device. It has an inclusive set of access interfaces that include all data-centric protocols, enabling enterprises and service providers to mix protocols ranging from 8 Mbps to 10 Gigabit Ethernet, including SONET/SDH, Ethernet, video (SDI/ASI), voice (E1/T1) and storage (SAN) applications. The LambdaDriver series chassis include three chassis, the four-slot LD 400, the eight-slot LD 800 and the 16-slot LD 1600. All LambdaDriver systems are 19-inch rack mountable chassis with a modular architecture and hot-swappable modules.

About Limelight Networks

Limelight Networks is the high performance content delivery network for digital media. Limelight's advanced network was built from the ground up to support scalable delivery of live and on-demand video, music and games to large global audiences. The Limelight network is optimized to deliver high-bandwidth media objects and large content libraries to audiences of any size via the Internet. As the content delivery network of choice for more than 400 of the world's top media companies, Limelight customers include Akimbo, ABC Radio Networks, Belo Interactive, "BuyMusic" @ Buy.com, DreamWorks, LLC, IFILM, Live365, Marimba, MSNBC.com, NC Interactive, NPR, Real Networks Rhapsody, Radio Free Virgin, Valve Software e, and Xbox Live. For more information, visit: http://www.llnw.com/

About MRV Communications, Inc.

MRV Communications, Inc. ("MRV") is a leading provider of network equipment and services, and optical components. MRV's networking business provides equipment used by commercial customers, governments and telecommunications service providers, and includes switches, routers, physical layer products and out-of-band management products as well as specialized networking products for aerospace, defense and other applications including voice and cellular communication. MRV's optical components business provides optical communications components for metropolitan, access and Fiber-to-the-Premises applications, through its wholly owned subsidiary LuminentOIC, Inc. MRV markets and sells its products worldwide through a variety of channels, including a dedicated direct sales force, manufacturers' representatives, value-added-resellers, distributors and systems integrators. MRV also has operations in Europe that provide network system design, integration and distribution services that include products manufactured by third-party vendors, as well as internally developed and manufactured products. Publicly traded since 1992, MRV is listed on the NASDAQ National Market under the symbol MRVC. For more information about MRV and its products, please call (818) 773-0900 or visit our websites at http://www.mrv.com/ and http://www.luminentoic.com/.

MRV Media Relations MRV Communications, Inc. David Rodewald (805) 494-9508 pr@mrv.com Limelight Networks Media Relations Wynne Ahern Communication Strategies 510-663-3213 wynne@commstrat.net

CONTACT: Media Relations, David Rodewald of MRV Communications, Inc.,
+1-805-494-9508, pr@mrv.com, for Limelight Networks; or Media Relations, Wynne
Ahern of Communication Strategies, +1-510-663-3213, wynne@commstrat.net, for
Limelight Networks

Web site: http://www.mrv.com/
http://www.luminentoic.com/
http://www.llnw.com/