Luxembourg's Tele2/Tango Selects Teleglobe for SCCP Transport and Advanced Mobile Signaling Services

Teleglobe International Holdings Ltd (NASDAQ:TLGB), a
leading provider of international telecommunications services to
Internet service providers and fixed and mobile network operators,
today announced that the company has entered into an agreement with
Tango, the mobile operation of the Tele2 Group in Luxembourg, to be
Tango's International Gateway Provider (IGP) connection to other
mobile network operators around the world for Signaling Connection
Control Part (SCCP) and advanced signaling services for roaming.
   Under the agreement, Tango will connect directly to more than 400
GSM operators spanning over 225 countries through Teleglobe's global
SS7 network for SCCP transit coverage. The reliable and secure SCCP
service and its associated management and reporting will provide Tango
with a high degree of revenue and service quality assurance for
Tango's international roaming and SMS services. The service also
provides access to a variety of revenue and margin enhancing hosted
value-added services, including a host of roaming management services.
   "Beyond its extensive reach and high-quality C7 network, Teleglobe
has been able to differentiate its services from alternative SCCP
providers through its signaling-based Mobile Services Platform, which
will allow Tango to benefit from high value-added services without the
need to integrate new equipment on our network," said Alex Zivoder,
CEO of TANGO. "Moreover, Teleglobe's signaling services provide unique
reporting and alert functionalities which are becoming increasingly
needed to properly monitor our roaming traffic."
   "Growth in roaming and in international SMS is driving GSM
operators to pay greater attention to international service quality
and maximization of revenue and margins," said Stephane Brisebois,
General Manager, Signaling Services at Teleglobe. "Our global SCCP
transit service and corresponding roaming management services empower
our GSM operator customers to obtain the highest value for these
growing services. We are very excited to enable Tango and the Tele2
Group enhanced roaming capabilities."
   Teleglobe's SCCP service is designed for ITU and ANSI GSM
operators who wish to use Teleglobe's global signaling network to
transport roaming and SMS signaling traffic. It provides transport and
Global Title Translation (GTT) based on either ITU E.164 and E.214 or
ANSI E.164 and E.212 numbering plan formats. The signaling is specific
to roamers and subscribers sending inter-network Short Message Service
(SMS) messages. The service can be used alone or with Teleglobe's
Wireless Global Roaming Service for ITU/ANSI conversion, allowing
seamless connectivity to and from North America. SCCP transit
customers directly connect to Teleglobe's network.
   Managed Roaming enables the home network GSM operator to assign a
traveling subscriber onto a specific visited network. The home network
operator may specify the visited network that provides the best
delivery of the home network suite of services (improving the customer
experience and increasing use of these services) and/or the preferred
tariff terms for roaming (contributing to better average margin per
user, or AMPU).
   Combined with Teleglobe's existing SCCP service for international
SS7 transport and routing management between mobile networks and the
Wireless Global Roaming (WGR) service for SS7 ITU/ANSI conversion,
Teleglobe's advanced Hosted Roaming Services provide the customer with
a complete integrated roaming solution for best service scalability,
reliability and costs.

   About Tele2/Tango:

   Tele2 is Europe's leading alternative telecom operator. Tele2
always strives to offer the market's best prices. With our unique
values, we provide cheap and simple telecom for all Europeans every
day. We have close to 28 million customers in 24 countries. We offer
products and services in fixed and mobile telephony, Internet access,
data networks, cable TV and content services. Our main competitors are
the former government monopolies. Tele2 was founded in 1993 by Jan
Stenbeck and has been listed on Stockholmsborsen since 1996. The share
has also been listed on Nasdaq since 1997. In 2004 we had operating
revenue of SEK 43 billion and reported a profit (EBITDA) of SEK 6.6
billion.
   In 1998 Tele2 launched its mobile services in Luxembourg under the
brand Tango. Tele2's mobile operation is today Luxembourg's leader in
providing high quality GSM, GPRS and UMTS services at competitive
prices, the company ranking among the cheapest operators in Western
Europe.

   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.
   With an annual run-rate of over 13 billion minutes, 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.

   Forward-looking Statements

   Teleglobe has included in this press release forward-looking
statements within the meaning of the Private Securities Litigation
Reform Act of 1995, including all statements concerning future or
expected events or results.
   Actual results could differ materially from those projected in the
companies' forward-looking statements due to numerous known and
unknown risks and uncertainties, including, among other things, the
risks and uncertainties described in the Form 10-K filed by Teleglobe
on March 17, 2005.