SINGTEL AWARDS CIENA MULTI-YEAR CONTRACT FOR ONLINE EDGE MULTISERVICE PLATFORM

CIENA to Supply Cost-Effective Access Solution To Singapore’s Leading Service Provider

Linthicum, MD — 11/17/2003

Ciena Corporation (NASDAQ: CIEN), a leading global provider of innovative network solutions, today announced that it has been awarded a multi-year contract from Singapore Telecommunications Limited (SingTel), Singapore’s dominant provider of telecommunications services and one of Asia’s leading service providers, for Ciena’s ONLINE Edge™ multiservice access platform.

“As our network needs evolve, we require carrier-class multiservice solutions that enable optimal bandwidth efficiency in the most cost-effective way,” said Lim Toon, SingTel’s chief operating officer. “Ciena’s ONLINE Edge platform meets those needs for our emerging edge applications.”

“SingTel’s deployment of ONLINE Edge demonstrates the practical, economic value that Ciena’s solutions provide to major carrier networks,” said Gary B. Smith, Ciena’s president and CEO. “Ciena is proud to provide this solution to SingTel, which is known for demanding the highest quality solutions for its network. We look forward to building a successful long-term relationship with SingTel.”

Ciena’s ONLINE Edge platform delivers service transparency through intelligent coarse wavelength division multiplexing (CWDM) technology and industry-leading service aggregation. The compact and modular ONLINE Edge platform is designed for service providers and enterprises that want to offer multiple high-bandwidth services over a single optical infrastructure. ONLINE Edge supports existing and emerging service provider offerings, such as broadband, storage and wavelength services.


About Ciena

Ciena Corporation delivers innovative network solutions to the world’s largest service providers and enterprises, 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.
About SingTel
SingTel is a world-class provider of domestic, international and mobile telecommunications as well as postal services. SingTel is Asia’s leading communications company with operations and investments in more than 20 countries and territories around the world. SingTel has been recognized as Best Asian Telecom Operator by industry publication, TelecomAsia, for six consecutive years since 1998.  The Group employs more than 19,000 people around the world and had a turnover of S$10.26 billion (US$5.80 billion) for the year ended 31 March 2003. More information on SingTel can be found at www.singtel.com.
Note to Investors
This press release contains certain forward-looking statements based on current expectations, forecasts and assumptions of Ciena (the Company) that involve risks and uncertainties. Forward-looking statements in this release, including but not limited to the features and benefits of Ciena’s products, are based on information available to the Company as of the date hereof. The Company’s actual results could differ materially from those stated or implied in such forward-looking statements, due to risks and uncertainties associated with the Company’s business, which include the risk factors disclosed in the Company’s Report on Form 10-Q filed with the Securities and Exchange Commission on August 21, 2003. Forward-looking statements include statements regarding the Company’s expectations, beliefs, intentions or strategies regarding the future and can be identified by forward-looking words such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “should,” “will,” and “would” or similar words. The Company assumes no obligation to update the information included in this press release, whether as a result of new information, future events or otherwise.
Press Contacts:
Nicole Anderson
Ciena Corporation
(877) 857 -7377
pr@ciena.com
Investor Contacts:
Marie Downing
Ciena Corporation
(888) 243-6223
ir@ciena.com