CIENA ANNOUNCES COMPLETION OF WAVESMITH TRANSACTION

LINTHICUM, MD — 06/16/2003

Ciena® Corporation (NASDAQ: CIEN), a leading provider of global network solutions, today announced it completed its acquisition of WaveSmith Networks, Inc. According to the agreement announced April 9, 2003, Ciena acquired all outstanding shares of WaveSmith and assumed all outstanding options and warrants in exchange for approximately 36 million shares of Ciena common stock.

Excluding the value of Ciena common stock issuable to Ciena as a result of a previous investment in WaveSmith, the price paid in the transaction was approximately $178 million, based on the closing price of Ciena’s common stock on Friday, June 13, 2003.


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