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Arbinet-thexchange names John Roberts Chief Financial Officer,
Steve Heap Chief Technology Officer

New Brunswick, NJ – April 20, 2004 – Arbinet-thexchange, the full-service trading solution for buyers and sellers of voice minutes, announced today the appointments of John Roberts as Chief Financial Officer and Steve Heap as Chief Technology Officer and VP, Business Development.

Commenting on the appointments, J. Curt Hockemeier, President and CEO of Arbinet-thexchange, said, “Our decision to bring John and Steve aboard underscores our commitment to provide our Members with financial expertise and innovative technology solutions.”

Prior to his appointment as CFO of Arbinet-thexchange, John Roberts was Chief Financial Officer at Razorfish (NASDAQ: RAZF), a $300 million publicly traded IT consulting firm. In this role, Mr. Roberts developed and implemented critical company strategies, including client development initiatives, operating plans and mergers and acquisitions. Prior to Razorfish, Mr. Roberts was a partner at PricewaterhouseCoopers.

“Arbinet-thexchange provides a ground-breaking solution for standardizing and optimizing transactions in the communications industry,” comments Roberts. “I look forward to working with our Members to enhance the financial impact thexchange can deliver and to expand our role as a financial partner.”

Steve Heap, the newly appointed CTO & VP, Business Development, brings diverse experience in Internet-based technologies, software and systems development, and engineering.

Prior to joining Arbinet-thexchange, Mr. Heap served as Chief Operating Officer and Chief Technology Officer for ePHONE, a VoIP service provider. Mr. Heap was also Senior Vice President and Chief Network Officer for the Internet backbone company, Aleron, Inc. and also held senior executive positions at Teleglobe, Inc., Concert Communications, and British Telecom.

“Arbinet-thexchange offers a compelling technology model and has a broad range of opportunities that can be implemented to help Members improve the efficiency of their businesses,” states Steve Heap. “I will focus on designing and delivering initiatives that will create new revenue opportunities for our Members and help them reshape their cost structures in this demanding environment.”

About Arbinet-thexchange

Two processes central to all telecom companies are selling access to their networks and routing calls off their networks to destinations worldwide. Arbinet-thexchange has created the liquid market and designed and built the world’s most advanced routing system to automate anonymous minutes trading between telecom companies. More than 300 Members use thexchange to reduce their cost of service, improve route quality and expand revenues by reaching new markets without extensive network build out.

A Member inputs trade parameters and the system automates sales and purchase order execution, complex calling code matching, call routing to specific breakout destinations and manages the quality of service of traded capacity. The system also handles the credit risk management, billing and commercial settlement aspects of these transactions. Arbinet-thexchange also distributes spot market transaction data that provides carriers with reliable pricing, quality and routing information for use in planning and negotiations. These products include: AXCESSCODESM calling code breakouts and AXCESSRATESM spot market price and quality data.

For more information, visit Arbinet-thexchange at

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