Expected next investor conference call information:
Conference Call Date: 9/14/2009
Conference Call Time (ET): 8:30 AM
Conference Call URL: http://phx.corporate-ir.net/phoenix.zhtml?c=94677&p=irol-irhome

With this latest milestone, military and defense agencies in the Joint community can deploy the SN 9000 Intelligent Multiservice Switch with confidence, knowing the product has met JITC's stringent requirements for interoperability (IO) and information assurance (IA). In addition, these agencies can achieve enhanced levels of multiservice on-ramp efficiencies and bandwidth-on-demand flexibility through intelligent networking software shared across Sycamore's optical switching platforms, including the SN 16000 Intelligent Optical Switch, which serves as the cornerstone of DISA's global optical switched network.

"As circuit and packet convergence at the network edge drives the need for enhanced levels of multiservice flexibility and multi-layer interoperability, we believe the SN 9000 offers a compelling advantage to government agencies evolving their communications networks," said Kevin Oye, vice president of systems and technology at Sycamore Networks. "JITC certification and APL accreditation demonstrate our ability to deliver high-value solutions with proven reliability, usability, and performance."

About Joint Interoperability Test Command

The Joint Interoperability Test Command (JITC) conducts testing of national security systems and information technology systems hardware, software and components. Services include developmental, conformance, interoperability, operational and validation testing.

JITC provides "one-stop systems testing" with its one-of-a-kind array of test beds and uniquely qualified staff. The command can interface all of its on-site capabilities and its network with any other testing or operational facility worldwide. The JITC facilities are located at Fort Huachuca, Ariz., and Indian Head, Md. JITC is a member of the Major Range and Test Facility Base (MRTFB).

JITC services the Defense Information Systems Agency (DISA), combatant commands, the Department of Defense (DoD) and other federal agencies, allies, coalition partners and commercial vendors. For complete service descriptions and points of contact, please visit http://jitc.fhu.disa.mil.

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. Other risks and uncertainties include, but are not limited to, actions, inquiries and findings that may result from certain stock option matters, including the restatement of previously issued financial statements; the Company's reliance on a limited number of customers; variation in the Company's quarterly results; industry pricing pressures and the high cost of product development required to remain competitive and keep pace with evolving features and technologies desired by customers; 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.

SOURCE: Sycamore Networks, Inc.

Press Inquiries 
Sycamore Networks, Inc. 
Scott Larson, 978-250-3433 
scott.larson@sycamorenet.com 
or 
Investor Inquiries 
Sycamore Networks, Inc. 
Bob Travis, 978-250-3432 
bob.travis@sycamorenet.com

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 press 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. Other risks and uncertainties include, but are not limited to, actions, inquiries and findings that may result from certain stock option matters, including the restatement of previously issued financial statements; the Company's reliance on a limited number of customers; variation in the Company's quarterly results; industry pricing pressures and the high cost of product development required to remain competitive and keep pace with evolving features and technologies desired by customers; 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.

SOURCE: Sycamore Networks, Inc.

Sycamore Networks, Inc. 
Investor Relations: 
Robert Travis, 978-250-3432 
bob.travis@sycamorenet.com 
or 
Press Inquiries: 
Scott Larson, 978-250-3433 
scott.larson@sycamorenet.com

Expected next investor conference call information:
Conference Call Date: 9/14/2009
Conference Call Time (ET): 8:30 AM
Conference Call URL: http://phx.corporate-ir.net/phoenix.zhtml?c=94677&p=irol-irhome