LuminentOIC announces SONET/SDH Compliant Bi-Directional SFP transceivers

March 28th, 2007

March 28, 2007, Chatsworth, CA and Hsin-Chu, Taiwan, - LuminentOIC, a leading supplier of access and metro transceivers, CWDM & DWDM solutions, and Fiber-to-the-Premise (FTTP) solutions, has extended its line of single-fiber bi-directional SFP Transceivers to include SONET/SDH data rates from 155Mb/s to 2.5Gb/s.

?Single fiber solutions enable carriers and providers to reduce cost through more efficient utilization of resources in their fiber plant?, said Jian Wang, Product Line Manager at LuminentOIC. ?Having shipped Ethernet-based single-fiber transceivers in volume for several years, we are now responding to an emerging demand for SONET compliant interfaces, including demand from several key Tier-1 system vendors with whom we are actively working.?

In addition to the newly-introduced SONET/SDH single-fiber transceivers, the product line includes bi-directional SFP transceivers for Fast Ethernet (125Mb/s) and Gigabit Ethernet (1.25Gb/s) applications, ranging from IEEE 802.3 BX10 interfaces for 10-km links, to 20km, 40km, and 80km reach versions. In addition to the standards-defined wavelength combinations, LuminentOIC leverages the internally sourced laser and optical subassembly capability to offer customized combinations to accommodate system specific wavelength allocations and constraints.

The bi-directional SFP transceivers are available in both SC and LC receptacle versions. They are fully compliant with the SFP Multi Source Agreement, and applicable Telcordia/ITU-T standards for SONET/SDH interfaces. Current offerings include Intermediate Reach (15km) and Long Reach (40km) distances, all available in temperature-hardened versions. The single-fiber SONET/SDH products are available for samples now, with volume production starting in April 2007.

About Luminent, Inc.

Luminent is a wholly owned subsidiary of MRV Communications [NASDAQ:MRVC] and a world-class, leading manufacturer of optical components since 1988. Luminent provides
complete solutions for Metro Transceivers, FTTP applications, and CWDM/DWDM solutions. The Company's US and Taiwan based facilities leverage off internal
vertical integration to offer the lowest cost, high volume component
solutions. With Research and Design centers in both California and Taiwan,
Luminent is well positioned to respond quickly and with great flexibility to
global customer requirements and design cycles. Luminent's Taiwan facility is
an ISO9001, TL9000 and ISO14001 certified high volume manufacturing facility
fully staffed to address continual cost reduction via production and
automation engineering teams. With a state-of-the-art, mass manufacturing
facility utilizing metal organic chemical vapor deposition (MOCVD) and fully
automatic packaging and testing processes, Luminent is positioned to deliver
state of the art solutions at compelling price points.

Alexis Black
Chief Sales and Marketing Officer
LuminentOIC
(818)773-9044 x1034
ablack@luminentoic.com