Sycamore Networks' Intelligent Optical Switching Systems Complete Joint Interoperability Test Command Assessment

During an independent evaluation process that spanned several months, Sycamore's SN 16000 and SN 3000 intelligent optical switching platforms and SILVX® Network Management System successfully completed an extensive regimen of standards conformance, systems performance, and multi-vendor interoperability testing. JITC's assessment goal is to ensure that leading edge technology is introduced into the DOD networking environment, providing maximum benefit and minimum risk.

During the JITC assessment, Sycamore products successfully demonstrated the ability to interoperate with Layer 2 and 3 devices on the client side of the network with data rates ranging from OC-3/STM-1 to OC 192/STM-64 and Gigabit Ethernet (GigE). Other capabilities assessed included both traditional and advanced protection mechanisms, such as 2-fiber and 4-fiber Bi-directional Line Switched Ring (BLSR)/Multiplex Section Shared Protection Ring (MS-SPRing), and advanced mesh restoration. JITC also tested advanced service provisioning, including Generalized Multi-Protocol Label Switching (GMPLS) and Sycamore's ability to provision virtually concatenated GigE circuits.

"Sycamore's switches continue to set the performance standard for advanced networking capabilities, including port-by-port support for diverse protection options, advanced control plane standards, and a wide range of service interfaces," said Kevin Oye, vice president of systems and technology at Sycamore. "The JITC assessment confirms our capabilities in these areas, and demonstrates our ongoing commitment to multi-vendor interoperability."

About Joint Interoperability Test Command

As designated by the Office of the Secretary of Defense (OSD), the Defense Information Systems Agency (DISA) Joint Interoperability Test Command (JITC) is DOD's Joint Interoperability Certifier and serves as DISA's Operational Test Agency (OTA). JITC is also a Major Range and Test Facility Base (MRTFB), allowing them to extend their test resources and certification processes directly to other federal government agencies, the private sector, and the nation's allies.

Through the DoD Conformance and Interoperability Testing Program, JITC is ensuring that leading edge technology can be introduced into the DOD networking environment, providing maximum benefit and minimum risk. For more information, please visit: http://jitc.fhu.disa.mil

About Sycamore Networks

Sycamore Networks, Inc. (NASDAQ: SCMR) develops and markets optical networking products for telecommunications service providers worldwide. The Company's products enable service providers to easily and cost-effectively transition their existing fiber optic network into an infrastructure that can provision, manage and deliver economic, high-bandwidth services to their customers. For more information, please visit www.sycamorenet.com.

Note to Editors: Sycamore Networks, etc. are trademarks of Sycamore Networks, Inc. All other trademarks are the property of their respective owners.

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Except for the historical information contained herein, we wish to caution you that certain matters discussed in this news release constitute forward-looking statements that involve risks and uncertainties. Actual results or events could differ materially from those stated or implied in forward-looking statements due to a number of factors, including but not limited to unfavorable conditions specific to the telecommunications, Internet and related industries; the commercial success of the Company's line of intelligent optical networking products; the Company's reliance on a limited number of customers; competition; the pursuit of strategic opportunities; variations in the Company's quarterly results; the rate of product purchases by current and prospective customers; significant investment required to support the Company's strategy; new product introductions and enhancements by the Company and its competitors; the length and variability of the sales cycles for the Company's products; product performance; conducting business internationally; manufacturing and sourcing risks; current and potential litigation; intellectual property disputes; general economic conditions including stock market volatility and capital market conditions and the other factors discussed in the Company's most recently filed Form 10-Q and the other reports filed by the Company from time to time with the Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future results or otherwise.