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MRV Earns Metro Ethernet Forum-18 Wireless Backhaul Certification for OptiSwitch 910

Company is One of the First Three Vendors to Earn Interoperability Certification from MEF

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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 its OptiSwitch® 910 demarcation device has received certification from the Metro Ethernet Forum (MEF) as being compliant with its circuit emulation standard – MEF-18 – for the backhaul of wireless voice over Ethernet. It is one of only three firms to have passed this certification.

The MEF is a global industry alliance that develops technical specifications and implementation agreements to promote interoperability and deployment of Carrier Ethernet worldwide. After extensive testing, the OS910 has passed the MEF-18 Abstract Test Suite for circuit emulation services over Ethernet which verifies that legacy TDM services such as DS1, E1, DS3 and E3 transported over Carrier Ethernet networks comply with the requirements defined in MEF-18 Implementation Agreement for the Emulation of PDH Circuits over Metro Ethernet Networks. The test suite certified that the OptiSwitch

910-M is an interoperable solution, enabling MRV to sell the solution to carriers to meet the need for mobile backhaul-with-a-pseudowire capabilities in a multi-vendor network.

“We are very pleased to see MRV demonstrate full compliance to MEF 18 in this important inaugural phase of the CES over Ethernet certification program,” said Bob Mandeville, President of IOMETRIX, the networking industry’s premiere testing authority and official test lab for the MEF.

“Demonstrating interoperability in wireless network backhaul is especially important for the Metro Ethernet industry as it removes one more limit to Ethernet being deployed universally in a carrier’s network,” said Nan Chen, President of the Metro Ethernet Forum. “I congratulate MRV and all of the participants for their achievement.”

“With dramatic growth of 3G services, and 4G services on the horizon, wireless backhaul has become a major consideration for carriers who need to provide maximum bandwidth to customers but in a cost-effective manner,” said Noam Lotan, president and CEO of MRV Communications. “These MEF tests help prove that the pseudowire technology employed by our OptiSwitch products transports packets the same way as traditional legacy systems, making it a cost-effective, interoperable solution that fits into existing networks. This continues MRV’s 20-year commitment to industry standards.”

Launched in Q4 2007, MRV’s OS910 intelligent demarcation solution enables the most comprehensive and standards-compliant OAM with integration of IEEE 802.1ag connectivity fault management (CFM) and ITU-T Y.1731 performance monitoring to assure that value-added services over a metro packet network maintain the highest service level agreements.

See MRV’s award winning OptiSwitch product family at the NXTcomm tradeshow booth SU6507.

About The MEF

The MEF is a global industry alliance comprising more than 140 organizations including telecommunications service providers, cable MSOs, network equipment/software manufacturers, semiconductors vendors and testing organizations. The MEF’s mission is to accelerate the worldwide adoption of Carrier-class Ethernet networks and services. The MEF develops Carrier Ethernet technical specifications and implementation agreements to promote interoperability and deployment of Carrier Ethernet worldwide.

For more information about the Forum, including a complete listing of all current MEF members, please visit the MEF web site at http://www.MetroEthernetForum.org/.

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 SourcePhotonics, 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.sourcephotonics.com.

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