Acme Packet Joins ITXC VoIPLink Ready Program.

Business Editors/High-Tech Writers

Spring VON 2004

SANTA CLARA, Calif.--(BUSINESS WIRE)--March 30, 2004

VoIPLink Ready(TM) status offers VoIP service providers using the Acme Packet Net-Net(TM) session border controllers a rapid connection to ITXC.net(R) for international calling

ITXC Corp.(R) (NASDAQ:ITXC) and Acme Packet(TM) today announced at the Spring 2004 VON Conference & Expo in Santa Clara, California, that Acme Packet has joined ITXC's VoIPLink Ready(TM) program to provide its service provider customers off-the-shelf VoIP interoperability with ITXC.net(R), one of the world's largest international voice networks. VoIP networks using Acme Packet's Net-Net(TM) session border controllers, along with other VoIPLink compatible network elements, can now quickly and reliably use ITXC's VoIPLink(TM) service for international call exchange.

Under the program, ITXC and Acme Packet will continue to work together to ensure network providers deploying Acme Packet's session border controllers in their VoIPLink-compatible networks will be immediately ready to use ITXC's VoIPLink service for VoIP interconnection to ITXC.net for international calling. ITXC and Acme Packet will also cooperate to market and sell their complementary VoIP service and products in select markets.

Acme Packet's Net-Net session border controllers address the security, service assurance and regulatory requirements of service providers at the borders of IP networks. The Net-Net products are deployed worldwide and span all border applications - peering, access network-backbone network, and data center -- and all protocols - SIP, H.323, and MGCP. Crucial security functionality includes hosted NAT traversal, access control, topology hiding, and DoS protection, while multi-protocol support with interworking and session admission control help satisfy service and SLA assurance requirements.

ITXC's VoIPLink service enables VoIP-based service providers to use VoIP to connect to ITXC.net for high quality, low cost-per- minute call exchange with every traditional and IP phone in the world.

"We are pleased that our Net-Net session border controllers are ITXC VoIPLink Ready and interoperable with the world's largest international VoIP network," said Jim Hourihan, Vice President Product Management and Marketing, Acme Packet. "Our service provider customers not only quickly expand their global footprint, they receive competitive rates for every call they send over ITXC.net and increased revenue for every call they terminate from ITXC.net using Acme Packet's session border controllers."

"Acme Packet is a cutting-edge company delivering the latest in Session Border Controller technology to service providers worldwide," said Jeffrey Bak, ITXC Director of Product Management. "As an ITXC VoIPLink Ready vendor, Acme's service provider customers are able to interconnect to the world's largest international VoIP network, ITXC.net(R). We applaud their commitment to ensuring VoIP service providers receive industry-leading products in this growing market segment."

VoIPLink Ready compatible vendor configurations include setup requirements that ensure off-the-shelf interoperability with ITXC.net. The setup requirements can be found at www.itxc.com/voiplink.

About Acme Packet:

Acme Packet enables network service providers to deliver premium, interactive communications - voice, video and multimedia sessions - across IP network borders. Our award-winning Net-Net family of session border controllers satisfies critical security, service assurance and law enforcement requirements in wireline, wireless and cable networks. The Net-Net session border controllers are deployed in over 30 production networks worldwide, spanning all border applications -- peering, access network-backbone network, and data center -- and all protocols - SIP, H.323, and MGCP. For more information, contact us at +1 781.756.6800, or visit us at www.acmepacket.com

About ITXC:

ITXC Corp. is one of the world's leading carriers based on minutes of international traffic carried. As a carriers' carrier, ITXC serves all major carriers in the US; many incumbent carriers worldwide including China Telecom, PLDT, Telkom South Africa, Telecom Colombia, Telenor, Telia, and VSNL; and emerging and competitive carriers including Intelig in Brazil and Data Access in India. ITXC also serves a growing number of mobile carriers including China Mobile and Smart Communications, leading mobile carriers in their respective markets.

ITXC is the global market segment share leader in VoIP international calling and one of the largest international voice carriers of any kind. Circuit-switched customers use ITXC services through switchless ITXC SuperPoPs in London, Frankfurt, Hong Kong, LA, and NJ or through ITXC-managed SNARCs(R) co-located in the customer's central office. VoIP-enabled networks use VoIPLink for the same services. Approximately one third of ITXC's current traffic is originated or terminated with over 160 VoIPLink-enabled carriers or service providers in over 60 countries.

For more information about ITXC, please visit www.itxc.com

Forward-looking statements:

ITXC has included in this press release certain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 concerning financing plans. "Forward-looking statements" consist of all non-historical information, and the analysis of historical information, including any references to future revenue growth, future expense growth, future credit exposure, future profitability, anticipated cash resources, anticipated capital expenditures, capital requirements, and the Company's plans for future periods. In addition, the words "could", "expects", "anticipates", "objective", "plan", "may affect", "may depend", "believes", "estimates", "projects" and similar words and phrases are also intended to identify such forward-looking statements.

Actual results could differ materially from those projected in ITXC's forward-looking statements due to numerous known and unknown risks and uncertainties, including, among other things, (i) uncertainties relating to executing the proposed merger, including, but not limited to the risks of delay in consummation of the transaction; the risk that either material adverse changes to either ITXC or Teleglobe, or governmental action or litigation may prevent the merger from closing or render it less desirable than anticipated; and the risk that delay in closing the transaction may extend the closing date after June 21, 2004, after which date either party to the merger has the ability to terminate the merger agreement subject to certain conditions contained in the merger agreement; uncertainties relating to the combined company after the proposed merger with Teleglobe, including but not limited to, unexpectedly high transaction costs; problems in the integration effort; Teleglobe's anticipated debt level and the inherent lack of flexibility resulting therefrom; inability to retain key employees, customers and suppliers through and after the merger process; ability to capture anticipated synergies; the ability of Cerberus Capital Management, L.P., Teleglobe's current controlling stockholder and majority owner of Teleglobe after the merger, to exert control over the combined company; the existence of undisclosed or unanticipated contingent liabilities; the risk that Teleglobe is not currently a publicly traded company; and the risk that Teleglobe may not be able to effectively execute its business plan and (ii) other risks relating to ITXC independent of the proposed merger, including the volatile and competitive environment for Internet telephony and telecommunications; changes in domestic and foreign economic, market and regulatory conditions; the inherent uncertainty of financial estimates and projections; uncertainty inherent in litigation; unanticipated technological difficulties; the risk that ITXC may not be able to access sufficient capital; the creditworthiness of and relationship with ITXC's customers; future transactions; risks inherent in being subject to significant regulation; and other considerations described as "Risk Factors" in Exhibit 99.1 to ITXC's Annual Report on Form 10-K for the year ended December 31, 2003 and in other filings made by us with the SEC. All such forward-looking statements are current only as of the date on which such statements were made. ITXC does not undertake any obligation to publicly update any forward-looking statement to reflect events or circumstances after the date on which any such statement is made or to reflect the occurrence of unanticipated events.