Sycamore Networks Announces Q3 Fiscal Year 2008 Financial Results Release Date and Webcast Information

Chelmsford, Mass. - 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 third quarter fiscal year 2008 financial results for the period ending April 26, 2008, on Thursday, May 29, 2008, prior to market open.

In conjunction with the release of its third quarter fiscal year 2008 financial results, Sycamore will host a conference call for investors at 8:30 a.m. ET on Thursday, May 29, 2008. 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 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 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 investigations commenced by the Securities and Exchange Commission and the U.S. Attorney's office with respect to certain stock options granted by the Company, and additional actions and findings that may result from the ongoing investigation into such stock options and the accounting therefor, including the restatement of previously issued financial statements, certain purported shareholder derivative actions filed against the Company and certain of its current and former officers and its directors. 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 Inquiries
Public Relations
Sycamore Networks, Inc.
Phone: 978-250-3433
media.info@sycamorenet.com