BURLINGTON, Mass. -- iBasis, Inc. (OTCBB: IBSE), the global VoIP company(TM), and Yahoo! Inc, a leading global Internet company, announced today that iBasis is providing international call termination for the Yahoo! Messenger with Voice service. iBasis is among the suite of providers delivering high-quality termination services for calls from the U.S. to international markets. The interconnection with iBasis enables Yahoo! Messenger with Voice to offer its customers high quality PC-to-Phone calling over iBasis' global VoIP network at very competitive rates.

Yahoo! Messenger with Voice provides enhanced PC-based calling capabilities for both making and receiving phone calls, depending on the combination of services purchased, at some of the lowest rates in the Voice over Internet Protocol (VoIP) industry. With the Phone Out feature, which leverages The iBasis Network for international calls, consumers in the U.S. can make VoIP PC-to-Phone calls by using their PC to place calls to traditional or mobile phones to more than 180 countries(1). Calls within the U.S. and to over 30 other countries can be made for two cents a minute or less(2).

The interconnection with iBasis includes use of iBasis' PremiumCertified(TM) international routing product, which is specifically designed to deliver the highest quality of service for retail traffic, and the company's DirectVoIP(TM) Broadband IP interconnection service.

"Like the Internet itself, Yahoo! is ubiquitous," said Ofer Gneezy, president and CEO of iBasis. "By delivering innovative services and compelling features to their enormous customer base, Yahoo! is playing a major role in the transformation of how people communicate. They did it with Yahoo! Messenger, and now they will do it with Yahoo! Messenger with Voice. We're very excited to be an integral part of the service."

Yahoo Inc. (Nasdaq: YHOO)