Sycamore Networks Announces Q2 Earnings Release Date and Webcast Information.

Business Editors

CHELMSFORD, Mass.--(BUSINESS WIRE)--Jan. 29, 2004

Sycamore Networks, Inc. (NASDAQ: SCMR), a leader in intelligent optical networking, today announced that the Company will report its second-quarter fiscal 2004 financial results for the period ending January 24, 2004, on Tuesday, February 10, 2004, at approximately 4:00 p.m. EST.

In conjunction with the release of its second-quarter fiscal 2004 financial results, Sycamore will host a conference call for investors at 4:30 p.m. EST on Tuesday, February 10, 2004. 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 Frances M. Jewels, Sycamore's chief financial officer.

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.

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 the rate of product purchases by current and prospective customers; the commercial success of the Company's line of intelligent optical networking products; the Company's reliance on a limited number of customers; new product introductions and enhancements by the Company and its competitors; the length and variability of the sales cycles for the Company's products; competition; manufacturing and sourcing risks; variations in the Company's quarterly results; general economic conditions including stock market volatility and capital market conditions as well as conditions specific to the telecommunications, Internet and related industries; and the other factors discussed in the Company's most recently filed Form 10-K and 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.