Ciena's CN 4200 Platform Achieves 4G and 10G Qualification from EMC E-Lab.

LINTHICUM, Md. -- Ciena([R]) Corporation (NASDAQ:CIEN), the network specialist, today announced EMC[R] E-Lab([TM])qualification of its CN 4200[TM] FlexSelect([TM]) Advanced Services Platform at 4G and 10G Fibre Channel capacities.

The EMC E-Lab conducts the industry's most rigorous, end-to-end interoperability testing, spanning every major platform and operating system, assuring customers the highest level of interoperability for multi-vendor networks. Ciena's CN 4200 is qualified to support EMC Symmetrix([R]) Remote Data Facility (SRDF([R])) software, including SRDF/S, SRDF/A and SRDF/Star, EMC Open Replicator([TM])software and EMC MirrorView([TM]) software over Fibre Channel connections at 4G and 10G capacity. It also is qualified with EMC Geographically Dispersed Disaster Restart (EMC GDDR) software.

Ciena's CN 4200 is a multiservice transport and aggregation solution that delivers cost-effective, flexible options for the extension of storage area networks, remote disk mirroring, remote back-up and other storage networking applications. The platform's FlexiPort technology offers the industry's only fully software-programmable optical port that eliminate the need to re-engineer the wide area network (WAN) each time a change is made to the IT infrastructure. All CN 4200 interface ports can be remotely configured and support any protocol on any interface, including SONET/SDH, Ethernet, Fibre Channel (FC), ESCON([R])/FICON([R]) and video.

EMC E-Lab qualification of the CN 4200 at 4G and 10G capacity will support the resale of Ciena solutions through the EMC Select Program, which enables customers to purchase pre-tested products directly from EMC and its partners to complete storage infrastructure solutions. Ciena's award-winning CN 2000[TM] Storage and LAN Extension Platform is also offered through the EMC Select program.

"This qualification is another example of Ciena's commitment to providing enhanced value to our customers through the use of extended, integrated network solutions with leading vendors like EMC," said Paul Schoenau, senior product manager at Ciena. "With the EMC E-Lab qualification of CN 4200 for 4G and 10G Fibre Channel, we can help an even wider range of customers to implement the right business continuity and disaster recovery plan for their business."

With the CN 4200 and CN 2000, Ciena provides a complete solution for any customer looking to replicate data over privately-owned Wide Area Networks (WANs), and also over service provider leased lines (Private Line GbE, DS3, SONET OC-3, OC-12, OC-48, SDH STM-1, STM-4, STM-16). In addition to the solutions available in EMC Select, Ciena also provides the following storage related services:

* WAN Network Assessment: Tool-based assessment of a WAN network for replication to demonstrate how a technology refresh can result in significant WAN cost savings.

* Data Migration Management Service (DMMS): Short-term lease of technology and professional services for enterprise data migration built around Ciena's CN 2000 and ON-Center([R]) Network Management Suite.

* FiberLocator([TM]): Offered through Ciena's partner program, helps customers locate dark fiber and optimize network connectivity using one of the largest independent databases consisting of 50 unique dark fiber providers and covering more than 100 metro areas in the U.S.

* Network Management Service (NMS): Complete network management solution, including service design, 24 x 7 network monitoring, fault management and performance monitoring and reporting.

Ciena will showcase the CN 4200 and CN 2000 platforms in its booth at EMC World, May 21-24, at the Orange County Convention Center in Orlando, Fla.

About Ciena

Ciena Corporation is the network specialist, focused on expanding the possibilities for its customers' networks while reducing their cost of ownership. The Company's systems, software and services target and cure specific network pain points so that telcos, cable operators, governments and enterprises can best exploit the new applications that are driving their businesses forward. For more information, visit www.ciena.com.

Note to Investors

This press release contains certain forward-looking statements based on current expectations, forecasts and assumptions that involve risks and uncertainties. These statements are based on information available to the Company as of the date hereof; and Ciena's actual results could differ materially from those stated or implied, due to risks and uncertainties associated with its business, which include the risk factors disclosed in its Report on Form 10-Q, which Ciena filed with the Securities and Exchange Commission on March 2, 2007. Forward-looking statements include statements regarding Ciena'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. Ciena assumes no obligation to update the information included in this press release, whether as a result of new information, future events or otherwise.

*EMC, Symmetrix, and SRDF are registered trademarks and MirrorView are trademarks of EMC Corporation.

*ESCON and FICON are trademarks or registered trademarks of International Business Machines Corporation.

*FiberLocator is a trademark of NEF, Inc