Sycamore Networks Q4 Earnings Conference Call and Webcast

Sycamore Networks, Inc. (NASDAQ: SCMR), a leader in optical networking, announced the Company will report its fourth-quarter and fiscal year 2004 financial results for the period ending July 31,2004, on Thursday, August 19, 2004, at approximately 4:00 p.m. EDT.

In conjunction with the release of its fourth-quarter and fiscal year 2004 financial results, Sycamore will host a conference call for investors at 4:30 p.m. EDT on Thursday, August 19, 2004.
The earnings conference call will be webcast live over the Internet. To listen to the live Webcast, visit the investor relations section of Sycamore's Web site www.sycamorenet.com.

Interested investors are encouraged to log onto the live Webcast at least 15 minutes prior to the call.