iBasis Names Former VocalTec President To Head Worldwide Sales Organization 

Company Appoints Craig Inouye as Vice President of Sales for Asia; Rob Stephens as Director for Regulatory Affairs

Basis, Inc., (NASDAQ: IBAS), the leader in international Internet telephony, today announced the appointment of Charles Giambalvo, former president of VocalTec Communications, Inc., as senior vice president of Worldwide Sales. The company also announced the appointments of Craig Inouye as vice president of Sales for Asia; and Rob Stephens as director of Regulatory Affairs.

As senior vice president of Worldwide Sales for iBasis, Giambalvo oversees the company's global sales force and is responsible for developing and managing execution of the company's worldwide sales strategies.

"We are very excited to have Charles on board during this period of rapid growth for the company. As a recognized leader in the communications industry, Charles brings to iBasis a long track record of extraordinary sales success and managerial excellence," said Gordon VanderBrug, executive vice president, iBasis, Inc. "We are also very fortunate to have proven industry stars like Craig Inouye and Rob Stephens on our executive team. With Craig driving our sales initiatives in Asia and Rob overseeing our global regulatory negotiations, we are poised to further extend our leadership in the exponentially growing market for international Internet telephony."

Charles Giambalvo, Senior Vice President of Sales 
As the former president of VocalTec Communications, Inc., a company that helped pioneer commercial IP (Internet Protocol) telephony, Giambalvo brings to iBasis more than 21 years of communications industry experience. Prior to VocalTec, Giambalvo was a vice president of sales at Stratus Computer. Giambalvo's strategies and executive leadership in this role resulted in significantly increased sales revenues for the company. Prior to Stratus, Giambalvo served as senior vice president of Sales and Customer Service at ECI Telecom, Inc., a leading manufacturer of telecommunications transmission equipment. Giambalvo has a Master's of Science degree in Telecommunications Management from Golden Gate University and holds a Bachelor of Science in Electrical Engineering and a Bachelor of Fine Arts in Communications from The New York Institute of Technology.

Craig Inouye, Vice President of Sales for Asia 
As vice president of Sales for Asia, Craig Inouye drives the company's sales strategies and initiatives for that fast growing region. Inouye is a proven communications industry sales executive who brings to iBasis an extensive knowledge of the Asian markets. Prior to joining iBasis, Inouye was director of International Business Development and Carrier Sales for DirectNet Telecommunications, a provider of wholesale international telecommunications products and services. In this role, Inouye managed DirectNet's U.S. wholesale carrier sales and initiated, negotiated and developed international long distance telecommunications projects and service arrangements with international carriers. Previously, Inouye spent 11 years with GTE Corporation where he held a variety of managerial and sales positions, including that of Regional Director for International Relations. In this role, Inouye was responsible for the company's Asian business development activities, including establishing strategic points-of-presence and new revenue sources. Inouye attended Hawaii Pacific University's graduate program and holds a Bachelor of Business Administration degree from the University of Hawaii.

Rob Stephens, Director of Regulatory Affairs 
As director of Regulatory Affairs at iBasis, Rob Stephens oversees the company's negotiations and ongoing relationships with national and international communications regulatory organizations around the world. Stephens brings to iBasis more than a decade of experience in regulatory issues and management for the communications industry. During six years at the Federal Communications Commission and the Office of the United States Trade Representative, Stephens helped develop, negotiate and implement the United States government's telecommunications policy regarding the World Trade Organization, the North American Free Trade Agreement, the International Telecommunications Union, the Organization for Economic Cooperation and Development, the Asia Pacific Economic Cooperation organization and the Inter-American Telecommunications Commission. Prior to his work at the FCC, Stephens was a telecom analyst for Consumers Union, publisher of Consumer Reports. He subsequently worked as a telecom analyst at Consumers International, the world's largest federation of non-governmental consumer organizations, where he developed a program that empowers grassroots consumer organizations worldwide to become effective advocates on telecommunications and Internet policies before national and international organizations. Stephens' expertise in communications policies and technologies includes an extensive knowledge of telecommunications accounting rates, interconnection, numbering, universal service and Internet policies in the United States and in developing countries. Stephens holds a Master's in Public Affairs and Master's in Latin American Studies from The University of Texas and Bachelor of Arts and Bachelor of Journalism degrees from The University of Florida.

About iBasis 
Founded in 1996, iBasis (NASDAQ: IBAS) is the global leader in international Internet telephony. iBasis uniquely combines a superior technology platform, premium Internet bandwidth and proprietary Assured Quality Routing™ (AQR) software to deliver toll quality Internet telephony services to tier one carriers and other international service providers. The iBasis Network™, a global, high-capacity Internet communications network, is the world's largest international Cisco Powered NetworkTM for Internet Telephony. The company can be reached at its worldwide headquarters in Burlington, Massachusetts, USA at 781-505-7500 or on the Internet at www.ibasis.net.

Except for historical information, all of the expectations, projections and assumptions contained in the foregoing press release constitute forward-looking statements under the Private Securities Litigation Reform Act of 1995 and involve risks and uncertainties. Important factors that could cause actual results to differ materially from such forward-looking statements include, but are not limited to, the considerations described as "Risk Factors" in the company's prospectus dated November 9, 1999, and the company's other SEC filings