AT&T deploys CIENA's intelligent optical transport systems

May 22, 2001
May 22, 2001--CIENA Corporation, a global provider of intelligent optical networking systems and software, announced that AT&T has successfully tested, certified and begun deployment of CIENA's MultiWave Metro intelligent optical transport system.

CIENA Corporation (NASDAQ: CIEN), a global provider of intelligent optical networking systems and software, announced that AT&T has successfully tested, certified and begun deployment of CIENA's MultiWave Metro intelligent optical transport system.

AT&T provides competitive local services to business customers in 71 major markets nationwide and plans to deploy CIENA's MultiWave Metro platform in a number of those networks to provide up to 24 wavelengths of protected OC-48 or OC-192 capacity per fiber. AT&T already is carrying "live" customer traffic using CIENA systems in its Los Angeles metro network.

MultiWave Metro is a system for high-capacity (up to 10Gbps) optical service transport and protection in metropolitan networks. The Metro platform supports multiple topologies, protocols and protection arrangements on the same fiber pair and in the same network node. Its open, standards-based architecture allows it to interface easily with all types of SONET/SDH, ATM and Fast IP equipment and is designed to be an ideal platform for providing ESCON, Fibre Channel, Gigabit Ethernet and rate-adaptive Gigabit Ethernet, FICON and digital video services.

About CIENA:

CIENA Corporation's optical networking systems form the core for networks and services. For more information, visit www.ciena.com.

ABOUT AT&T:

AT&T is a voice, video, and data communications company, serving consumers, businesses, and government. For more information, visit www.att.com.

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