NTT to Deploy CoSine IP PlatformNTT to Deploy CoSine IP Platform

REDWOOD CITY, Calif. --CoSine Communications, Inc., a leading provider of managed, network-basedIP Service Delivery Platforms for Service Providers, announced today thatNTT Communications (NYSE: NTT) has purchased CoSine's IP Service DeliveryPlatform to provide a transcontinental, network- and IPSec-based VirtualPrivate Network (VPN) service to customers around the world.

NTT Communications, an international telecommunications carrier reachingover 200 countries worldwide, will provide an international, network-basedVPNservice that secures select corporate customers' IP traffic between NTTCommunication's Japanese network via its Tokyo Point of Presence (POP) andother locations throughout the world. NTT Communications' IPSec-based VPNservice provides business customers secure international IP transportwithoutthe operational and maintenance costs associated with VPNs built usingequipment that resides at the customer location. Instead of requiring anarray of devices located at subscriber sites all around the world, CoSine'splatform will provide VPN and IP services from within NTT Communications'POPs, where they can be centrally managed and supported by the ServiceProvider.

"NTT Communications' purchase of CoSine's solution is a validation ofthenetwork-based platform strategy and demonstrates their leadership inrecognizing that value-added IP services are a strategic business tool forService Providers in today's Internet-driven economy," said Dean Hamilton,president and chief executive officer of CoSine. "The CoSine platformenablesService Providers like NTT Communications to leverage their global networktoprovide value-added IP services that complement their existing portfolio ofvoice and data services. NTT Communications is essentially creatingone-stopshopping for enterprises that want to leverage the Internet to conductbusiness all over the world."

CoSine Communications Inc.