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 MRV LambdaDriver WDM Systems Awarded NEBS Certification

Compact, Scaleable Wave Division Multiplexing Systems Certified for US Telecom Industry Central Office Environments

CHATSWORTH, Calif., Sept 20, 2006 -- MRV COMMUNICATIONS, INC. (Nasdaq: MRVC), a leading provider of products and services for WDM and optical transport, metro Ethernet, fiber optic components, 10GE, out-of-band networking and other service aware networking products, today announced that its LambdaDriver LD 1600 and LambdaDriver LD 800 wave division multiplexers (“WDM”) have achieved compliance with Network Equipment Building Systems (“NEBS”) Level 3, the leading product safety and reliability standard for telecommunications equipment.

"Our carrier customers demand that the WDM systems they install be held to the highest standards of safety and reliability," said Noam Lotan, MRV President and CEO. "We designed the LambdaDriver® coarse WDM ("CWDM") and dense WDM ("DWDM") system from the ground up to comply with NEBS Level 3 robust standards and this certification assures them that the LambdaDriver WDM meets those criteria.”

The certification means that MRV’s WDM systems meet all safety standards required for use in U.S. tier one central office applications. To become certified at NEBS Level 3, the LambdaDriver WDM system passed strict physical, electrical and environmental tests and demonstrated that MRV’s CWDM and DWDM solutions will operate safely and reliably in a central office environment.

The LambdaDriver systems join MRV’s other NEBS-compliant product lines including its LX out-of-band management solutions, and its Fiber Driver optical transport WDM systems for central office fiber optimization applications.

The LambdaDriver WDM and optical transport solutions are scalable CWDM and DWDM systems specifically designed for businesses and service providers that require flexible, compact and cost-effective fiber optimization systems for high-speed data, storage, voice, and video networks. The LambdaDriver WDM series includes the LD 400, LD 800 and LD 1600 mountable WDM chassis with modular architecture and hot-swappable modules. Each product will support transmission of up to 800 Gbps over a single fiber pair using advanced WDM technology including high-performance SONET/SDH, 10 Gigabit Ethernet, High Definition video, voice and storage applications.

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 www.mrv.com and www.luminentoic.com.

Media Relations
MRV Communications, Inc.
David Rodewald
(805) 494-9508
pr@mrv.com

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