EATONTOWN, NJ May 9, 2005 Quintum Technologies, a leading innovator in VoIP technology, announced today that iBasis, Inc. (OTCBB: IBAS), a leader in international long distance, VoIP, and prepaid calling cards, has certified the Tenor AXT and AXM VoIP MultiPath Switches for interoperability with their international VoIP network through the iBasis DirectVoIPT Certified program.

As a result of the certification, iBasis customers and partners that deploy the Tenor AXT or AXM Series VoIP MultiPath Switches in their networks where analog termination is required and digital circuits are not available, will be able to establish direct interconnections to exchange international traffic with the iBasis network. iBasis and Quintum engineers collaborated to develop the necessary software enhancements to enable the Quintum platform to achieve DirectVoIP certification as a very cost-effective analog solution. iBasis required refinements to provide effective call supervision to support iBasis' high quality standards. Call supervision issues can be particularly difficult problems for service providers to solve.

"Quintum was very responsive to our technical requirements, and we collaborated very effectively to enhance call supervision and overcome interoperability challenges," said Paul Floyd, iBasis senior vice president of research and development. "As a result, we're able to provide our wholesale trading partners an effective analog interconnection to our VoIP network in those difficult international markets where digital connections simply are not an option."

Through its DirectVoIPT Certified program, iBasis has certified the Quintum Tenor AXT and AXM Series devices for interconnection with the iBasis network. The verified interoperability between Quintum and iBasis allows service providers with Tenors in their POPs to establish interconnections to the iBasis global network in a fast and straight-forward manner.

"Carriers and service providers can now benefit from Quintum's integrated VoIP solutions and expand their termination revenue," said Chuck Rutledge, VP of Marketing for Quintum. "At the same time, they can leverage iBasis' superior quality and operational expertise in deploying IP to IP interconnections. Our inclusion in the DirectVoIPT Certified program also makes it easier for Quintum's service provider customers to work with iBasis and gain access to the high volume of international traffic iBasis carries."

About iBasis

Founded in 1996, iBasis (OTCBB: IBAS) is a leading wholesale carrier of international long distance telephone calls and a provider of retail prepaid calling services, including the PingoT web-based offering (www.pingo.com) and disposable calling cards, which are sold through major distributors and available at retail stores throughout the U.S. iBasis customers include many of the largest telecommunications carriers in the world, including AT&T, Cable & Wireless, China Mobile, China Unicom, MCI, Sprint, Skype, Telefonica, Telenor, and Telstra. iBasis has carried more than 13 billion minutes of international voice over IP (VoIP) traffic over its global Cisco PoweredT network, and is one of the ten largest carriers of international voice traffic in the world. For three consecutive years service providers named iBasis the best international wholesale carrier in ATLANTIC-ACM's annual International Wholesale Carrier Report Card . iBasis was also ranked among the fastest-growing technology companies in New England in the 2002, 2003, and 2004 Technology Fast 50 programs sponsored by Deloitte & Touche. The Company can be reached at its worldwide headquarters in Burlington, Massachusetts, USA at 781-505-7500 or on the Internet at http://www.ibasis.com.

About Quintum Technologies, Inc.

Headquartered in Eatontown, NJ, Quintum specializes in voice-over-IP technologies that bring reliability and voice clarity of public telephone networks to Internet telephony. Its Tenor VoIP MultiPath switch product lines are designed to help businesses of all sizes achieve a risk free migration to a converged network. Quintum's Tenor product line offers a wide range of unique features that differentiate it from other VoIP solutions. These features include real time PSTN failover that eliminates risk from poor IP Quality of Service, MultiPath call routing allowing easy installation into existing data and telecom environments, and transparent communication across NAT (network address translation) firewalls. Quintum Technologies sells its MultiPath switches worldwide through its direct sales force and a network of resellers and distributors. For more information call 1-877-SPEAK IP (1-877-773-2547) in the US, 732-460-9000 outside the US, or visit www.quintum.com.

Quintum Technologies (China) Ltd. can be reached at the following numbers:
Hong Kong Office Phone Number - 852-2123-9018
Shanghai Office Phone Number - 86-21-64263608/18/28