Sycamore Networks, Inc. (NASDAQ: SCMR), a leader in intelligent bandwidth management solutions for fixed line and mobile network operators worldwide, today announced that the Company will report its fourth quarter and fiscal year 2009 financial results for the period ending July 31, 2009, on Monday, September 14, 2009, prior to market open.

In conjunction with the release of its fourth quarter and fiscal year 2009 financial results, Sycamore will host a conference call for investors at 8:30 a.m. ET on Monday, September 14, 2009. The call will be broadcast live over the Internet. To listen to the live Webcast, visit the Investor Relations section of Sycamore's Web site, located at www.sycamorenet.com. Interested investors are encouraged to log onto the live Webcast at least 15 minutes prior to the call. Participating in the call will be Daniel E. Smith, Sycamore's president and chief executive officer and Paul F. Brauneis, Sycamore's chief financial officer.

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