BOSTON --

-- NeuStar is now a NexTone Compatible™ partner and its SIP-IX IP exchange service has achieved ServiceReady™ certification with NexTone's IntelliConnect™ System for VoIP peering. ServiceReady certification validates that SIP-IX, an open-standards based, multi-service registry has achieved end-to-end interoperability with the NexTone IntelliConnect System and signals a close working relationship between NexTone and NeuStar in the areas of service definition, support training, sales collateral, and release management.

-- This ServiceReady solution will enable VoIP network operators to peer with one another seamlessly and securely at leading Internet Exchange Providers (IXP) allied with NeuStar, including the Amsterdam Internet Exchange (AMS-IX), Equinix, the Hong Kong Internet Exchange (HKIX), and TELEHOUSE.

-- Service providers and enterprises deploying NexTone products and NeuStar services will be able to originate, terminate, and share calls or sessions for mobile, fixed, and broadband communications.

-- NeuStar's SIP-IX facilitates the exchange of SIP-based application data between IP networks by providing standardized interfaces for cross- party provisioning, business processes to ensure neutrality and enable inter-party coordination, and a consistent view of comprehensive, authoritative registry and addressing data.

-- NeuStar's policy-enabled shared registry services are integrating with the IP peering fabric of its IXP partners around the world to create a service offering with superior reach, scalability, security, and cost- effectiveness.

-- The NexTone IntelliConnect System will give NeuStar customers a flexible, reliable, and secure way to interconnect with the SIP-IX service. The NexTone system provides trusted ENUM connectivity to the SIP-IX service to find off-net partners. Regardless of the call destination, the NexTone system will deliver seamless service connectivity using any-to-any SIP and H.323 session signaling and on-demand media adaptation to ensure the session maintains the highest quality.

-- The NexTone IntelliConnect System provides dynamic policy enforcement capabilities, using NexTone's unique Dynamic Policy Management™ (DPM) technology, enabling service partners to automatically manage changes in service quality, capacity, and availability across peering partners.

-- The NexTone IntelliConnect System uses advanced session routing policies so that service providers can route traffic between multiple peering partners using a blend of least cost, best quality, and most profitable routing. Security policies, with Call Admission Control enforcement, and topology hiding protect the integrity of all partner networks and prevent Denial of Service attacks and service theft.

-- Finally, for full business accountability, the NexTone IntelliConnect System provides NeuStar with real-time session detail records and on-demand reporting, for granular troubleshooting and diagnostics.

NexTone Communications Inc.

Neustar Inc. (NYSE: NSR)