CIENA CORPORATION ANNOUNCES REPORTING DATE AND CONFERENCE CALL FOR FISCAL 2003 THIRD QUARTER

Linthicum, MD — 08/05/2003

Ciena Corporation (NASDAQ: CIEN) will announce results for its fiscal 2003 third quarter on Thursday, August 21, 2003, via Business Wire and First Call 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 teleconference call beginning at 8:30 AM (Eastern) on August 21, 2003. Interested listeners may access the live web broadcast at www.ciena.com.

Rebroadcast Information

For those listeners unable to participate in the live web broadcast on Thursday, August 21, an archived version of the conference call will be available shortly following the conclusion of the live call in the Investor Relations section of Ciena’s website at: www.ciena.com.


About Ciena

Ciena Corporation delivers innovative network solutions to the world's largest service providers, increasing the cost-efficiency of current services while enabling the creation of new carrier-class data services built upon the existing network infrastructure. Additional information about Ciena can be found at www.ciena.com.
Press Contacts:
Nicole Anderson
Ciena Corporation
(877) 857 -7377
pr@ciena.com
Investor Contacts:
Marie Downing
Ciena Corporation
(888) 243-6223
ir@ciena.com