Ciena Corporation (NASDAQ: CIEN) expects to announce unaudited results for its fiscal fourth quarter and fiscal year ended October 31, 2009 on Thursday, December 10, 2009, via Business Wire before the open of the financial markets. The press release also will be available on Ciena’s website at www.ciena.com.

In conjunction with the announcement, Ciena’s management will host a live audio web broadcast beginning at 8:30 AM (Eastern) on December 10, 2009 accessible via www.ciena.com.

Rebroadcast Information

For those listeners unable to participate in the live web broadcast on Thursday, December 10, 2009, an archived version of the conference call will be available shortly following the conclusion of the live call in the Investor Relations/Events section of Ciena’s website at: www.ciena.com.

About Ciena

Ciena specializes in practical network transition. We offer leading network infrastructure solutions, intelligent software and a comprehensive services practice to help our customers use their networks to fundamentally change the way they compete. With a global presence, Ciena leverages its heritage of practical innovation to deliver maximum performance and economic value in communications networks worldwide. We routinely post recent news, financial results and other important announcements and information about Ciena on our website. For more information, visit www.ciena.com.