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MARLBOROUGH, Mass., October 29, 2007 - Pactolus Communications Software Corporation, makers of the industry's most broadly-deployed SIP applications and service creation/delivery solutions, today announced that Global Crossing (NASDAQ: GLBC) has selected the Pactolus RapidFLEX™ Service Creation and Delivery Platform and SIPware™ Event Audio Conferencing application to enable delivery of next-generation Event Call services. The new Pactolus platform, now riding on Global Crossing's Voice over Internet Protocol (VoIP) network, leverages IP's rich potential for scale, economy, service feature innovation and reliability.

The announcement was made at the Fall 2007 Voice On The Net (VON) Conference & Expo in Boston, Mass., and featured during the Wainhouse Research CSP Summit for collaboration and conferencing service providers and technology partners.

Wainhouse Research Partner and CSP Practice Manager Marc Beattie notes: "The industry needs IP-based solutions that exceed those of routine peer-to-peer and PBX-level IP services to aggregate thousands of users on a single call, achieve scale and stability through geographically distributed networking, and safeguard call states and service resiliency."

"Global Crossing's collaboration solutions, which are part of our converged IP services portfolio, provide multinational enterprises with the tools they need to efficiently share information, anytime and anywhere," said Dan Wagner, Global Crossing's executive vice president of enterprise and collaboration services. "By integrating Pactolus' solutions, RadiSys' media server technology with our global IP network, we've enhanced the scalability, robustness, resiliency, and monitoring and reporting capabilities of our operator-assisted audio conferencing architecture. The flexible interface will enable greater operational efficiencies and accelerate new service creation to enhance our customers' experience and support capacity as demand grows from subscribers."

Global Crossing's Event Call platform now includes three primary elements: 1) the service delivery platform, including the object-based Pactolus RapidFLEX Service Creation Environment, the RapidFLEX Application Server, and the RadiSys Convedia Media Server, 2) the Pactolus SIPware Event Conferencing Application, and 3) the Pactolus Event Conference Manager (ECM). The conferencing platform service is delivered through a media gateway to PSTN-based users.

The Event Call platform marks the first large-scale deployment of the Pactolus Event Conference Manager (ECM), an innovative management web interface that simplifies the provisioning and management of large-scale conferences, and provides a live, single-screen view of participants, queues, Q&A session controls, etc.

The Global Crossing Event Call platform is also one of the industry's first to integrate the use of media servers on operator-assisted calls, allowing the creation and implementation of robust features. To date, the use of media server-driven features has been confined to smaller-scale reservationless calling services.

Redundancy Support For Ongoing Scale and Subscriber Growth

Pactolus' award-winning InService high availability architecture will be integrated into the Global Crossing Event Call Service, allowing the carrier to eventually leverage geographically distributed network resources and add service capacity as customer demand grows. InService was developed to let carriers achieve unprecedented subscriber service resiliency and recovery speeds for highly scaled deployments. It supports:

• Load balancing of various service-enabling IP resources, including application server and media server resources, across multiple geographically-dispersed service POPs;
• Routing of call traffic in real-time across multiple sites around media gateway, application server, and media server failures;
• Sustained call states in multiple service POPs simultaneously;
• Automated failover of database processing to alternative service POPs; and
• Automated failover of all call processing to alternative service POPs in the event of primary site failure.