05/19/2008

MediaXstream Deploys Sycamore Optical Mesh Solution for Next-Generation Video Transport Network

SN 9000 and SILVX Empower Delivery of High Definition Video Services for Media, Sports, and Entertainment Industries

Chelmsford, Mass.  - Sycamore Networks, Inc. (NASDAQ: SCMR) today announced that MediaXstream, Inc., a leading network service provider for carrier-neutral, high quality transport and managed services for the media production and broadcast industries, has deployed Sycamore's SN 9000 Intelligent Multiservice Switch and SILVX® Network Management System (NMS) as the foundation for its nationwide optical switched network. MediaXstream selected Sycamore's proven optical mesh technology to help deliver innovative network services designed to support the high quality viewing experience demanded by today's bandwidth-intensive digital media content. With a growing footprint in major North American markets and the United Kingdom, MediaXstream's high-value service offerings are optimized for producers, broadcasters, and content distributors to more economically create, manage, and distribute original media - especially High Definition (HD) media. With proven reliability and industry-leading scalability, the Sycamore optical mesh solution enables MediaXstream to meet the growing demand for high quality HD contribution and distribution services. MediaXstream serves television and film production companies, news agencies, sports broadcasters, mobile content operators, and IPTV service providers. "Our purpose-built HD network serves many of the biggest names in the media and broadcast business, and their demand for capacity and reliability is unprecedented," said Wayne Price, MediaXstream's chief technology officer. "Sycamore's best-in-breed optical mesh solution allows us to efficiently manage service bandwidth in the core, reduce operations costs through automated point-and-click provisioning, and deliver the advanced protection and restoration capabilities necessary for content-rich HD networking." The SN 9000 intelligent optical switched network leverages Sycamore's ASON/GMPLS-powered BroadLeaf® control plane intelligence and SILVX network management to maximize utilization of network capacity, simplify end-to-end service provisioning and performance management, and lower overall operations costs. "We are pleased to partner with MediaXstream as they roll out innovative, next-generation services customized for a new era of digital media and high quality programming," said Daniel E. Smith, Sycamore's president and chief executive officer. "Service interface flexibility, network reliability, and simplified operations are paramount to customers, and we will continue to advance our leadership in optical mesh networking to help them deliver differentiated and profitable network services." The SN 9000 Intelligent Multiservice Switch consolidates multiple functions into one compact and economical networking platform. High-density, multiservice aggregation empowers diverse applications - from edge and hub to metro and regional core - with unprecedented configuration flexibility. Building upon Sycamore's proven intelligent networking capabilities, the SN 9000 shares common networking software and a single management system with the SN 16000 and SN 3000 optical switching platforms to ensure end-to-end manageability and resiliency. With reliable support for rapid, end-to-end provisioning of circuit, packet, and optical services, in any network architecture and any topology, the SN 9000 extends bandwidth optimization to diverse network segments and multiple service layers. SILVX offers the industry's most innovative, integrated, and scalable solutions for simplifying the end-to-end provisioning and management of high-speed bandwidth services - from one, unified management platform. Automated networks, dynamic services, and true point-and-click provisioning require unprecedented operational integration and synchronization. Robust and reliable SILVX software provides the multi-layer visibility, ease of use, and exceptional service awareness network operators need now. An infrastructure foundation built on Sycamore intelligence introduces new operational efficiencies, creates new service opportunities, and adapts gracefully, to keep pace with change. About MediaXstream, Inc. MediaXstream provides carrier-neutral, high quality transport and managed network services for the production and broadcast industries in over 30 North American markets. Operating the largest national DTM network, we specialize in transporting flawless digital and High Definition content in its native formats as demanded by sports, TV and film production, news, mobile and IPTV. The company has received financial backing from Constellation Ventures and Columbia Ventures Corporation. (www.mediaXstream.tv) About Sycamore Networks Sycamore Networks, Inc. (NASDAQ: SCMR) is a leading provider of intelligent bandwidth management solutions for fixed line and mobile network operators worldwide. From multiservice access networks to the optical core, Sycamore products enable network operators to lower overall network costs, increase operational efficiencies, and rapidly deploy new revenue-generating services. Sycamore's global customer base includes Tier 1 service providers, government agencies, and utility companies. For more information, please visit www.sycamorenet.com. We wish to caution you that certain matters discussed in this news release constitute forward-looking statements regarding future events that involve risks and uncertainties. Readers are cautioned that actual results or events could differ materially from those stated or implied in the forward-looking statements. These risks and uncertainties include, but are not limited to, the findings, including possible tax liabilities and penalties resulting from the audit of certain of the Company's income tax returns by the Internal Revenue Service; risks relating to the formal investigation commenced by the Securities and Exchange Commission, such as a civil proceeding which may seek, among other things, injunctive relief and a civil penalty, with respect to certain stock options granted by the Company; the investigation by the U.S. Attorney's office with respect to stock option matters; and other additional actions and findings that may result from the ongoing investigation into such stock options and the accounting therefore, including the restatement of previously issued financial statements and certain purported shareholder derivative actions filed against the Company and certain of its current and former officers and directors; the Company's reliance on a limited number of customers; variation in the company's quarterly results; industry pricing pressures and competitive factors including new product introductions impacting customer orders; the consolidation of both suppliers and customers in the telecommunications marketplace and general economic conditions. Certain additional risks are set forth in more detail in the section entitled "Risk Factors" in the Company's most recent Quarterly Report on Form 10-Q and Annual Report on Form 10-K filed by the Company 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.

Contact:

Investor Inquiries Investor Relations Sycamore Networks, Inc. Phone: 978-250-3460 investor.info@sycamorenet.com

Press Contact Erin Walsh PerkettPR Phone: 781-686-9502 sycamore@perkettpr.com