Teleglobe Announces Successful Completion of SS7 over IP Testing with Blueslice Networks.

CANNES, France -- Teleglobe International Holdings Ltd (NASDAQ:TLGB)

--Connection paves way for Teleglobe's carrier-grade SS7 over IP signaling offering to mobile operators to provide low cost, robust, and easily scalable connectivity

--Blueslice gains access to Teleglobe's 400 plus mobile carrier destinations

Teleglobe International Holdings Ltd (NASDAQ:TLGB), a leading provider of international telecommunications services to carriers and internet service providers, and Blueslice Networks, a leading provider of mobile network infrastructure for subscriber profile management, today announced at the 3GSM World Congress that the companies have successfully completed SS7 over IP testing and are ready for traffic between Teleglobe's global SS7 network and Blueslice's development lab. Test completion marks the first step toward Teleglobe's utilization of an open-standard SS7 over IP to enhance their global SS7 network infrastructure. Attendees at the Congress are invited to visit Blueslice Networks at booth J49 in Hall 3, where several representatives will be on hand to answer questions.

With Blueslice as a pioneering user, Teleglobe is able to accelerate its implementation of an open-standard SS7 over IP signaling capability in its network. Concurrently, Blueslice gains immediate access to the over 400 mobile operators reached through Teleglobe's global SS7 network, providing its customers with the option to remotely access and trial Blueslice's Mobile SIP Exchange(TM), a next generation Home Logical Register (HLR), and Universal Presence Server (TM), a Presence and Location subscriber management application. This eliminates the need to install and test Blueslice's equipment in their own networks in order to trial the services.

Up until now, Teleglobe relied solely on physically diverse international private lines to connect its customers to its mobile signaling network. With SS7 over IP, Teleglobe will have a cost-efficient, flexible and reliable alternative to bring customers on-net, allowing Teleglobe to provision its signaling services more rapidly to reach a greater number of customers. SS7 over IP is ideal for mobile operators who are far from Teleglobe's SS7 points of presence and who want to quickly use Teleglobe's SS7-based SCCP transport service or to expand their mobile service offerings to include Teleglobe's hosted managed roaming, prepaid roaming and other SS7-enabled value added mobile services.

The SS7 over IP technology will also be used in its interconnection to other SCCP transport providers, allowing Teleglobe to better manage its customer requirements, significantly reduce infrastructure costs and increase its overall SS7 network scalability.

"This collaboration opens up mobile operators to a trusted HLR solution for mobile signaling connectivity and subscriber profile management, built on an innovative and open standard platform," said Stephan Ouaknine, President and CEO of Blueslice Networks. "We are pleased that Teleglobe has chosen to work with us in a testing environment and look forward to continued efforts in the future to further answer mobile network operators' needs. Working with Teleglobe also gives us new opportunities and a stronger offering for the compelling MVNO market."

"As Teleglobe builds its next-generation mobile signaling network, its focus on quality and scale remains," said Stephane E. Brisebois, Teleglobe's General Manager of Mobile Signaling Service. "In the short term, SS7 over IP will allow Teleglobe to extend its reach and speed of interconnection in areas where traditional IPL services are long and expensive to implement. SS7 over IP will bring more flexibility to adapt network capacity to the customer requirements, including the ability to face significant traffic variations, such as that resulting from SMS-voting or SMS-campaigns. Our relationship with Blueslice will help us ensure we deliver the very high reliability our mobile carrier customers require."

About Blueslice Networks:

Blueslice Networks develops subscriber profile management solutions for today's networks, which will facilitate moving forward into a predominantly mobile world. Our products and services help operators migrate from traditional IP networks and 2G (Second Generation) circuit switched SS7 networks to next generation IP networks and 3G IMS (Third Generation IP Multimedia Subsystem) standards.

Blueslice Networks' flagship product, the Mobile SIP Exchange, is a single carrier-grade platform for GSM/GPRS, VoIP/WiFi, 3G IMS, and MVNO networks, offering a low-cost, scalable HLR, dual-profile HSS supporting IP and 3G IMS networks, and SIP Application Server to speed up deployment times of new services. Blueslice does business with the world's leading mobile operators and infrastructure providers.

Blueslice Networks is a private company with headquarters in Montreal, Canada. For more information, please visit our website at www.blueslice.com.

About Teleglobe:

Teleglobe International Holdings Ltd is a leading provider of international voice, data, Internet and mobile roaming services with over 50 years of industry expertise in international telecommunications. Teleglobe became a public company trading on the Nasdaq under the symbol TLGB with the acquisition of Voice over IP (VoIP) network leader ITXC Corp. on June 1, 2004.

Teleglobe owns and operates one of the world's most extensive telecommunications networks, reaching over 240 countries and territories with advanced voice, mobile, and data services. Teleglobe is the carrier of choice to more than 1,200 wholesale customers representing the world's leading telecommunications, mobile operators and Internet service providers.

Carrying over 11 billion minutes per year, and a significant portion of the world's Internet traffic, Teleglobe's network is consistently ranked among the most robust and reliable, performing at the high end of industry standards. Detailed information about Teleglobe is available on the company's web site at www.teleglobe.com.