Teradyne Completes Major Test System Upgrade for Belgacom

Teradyne, Inc., (NYSE: TER), a leading provider of broadband test
systems, today announced the completed delivery of its next-generation
line test system to Belgacom. Belgacom awarded the business to
Teradyne in order to upgrade its entire test infrastructure and
accommodate its four million line network. Belgacom granted final
acceptance of the system in March 2007.

The upgrade includes Teradyne's next-generation of Test System
Controllers (TSCs) and its latest 4TEL(R)II expert system software,
plus over one thousand Loop Diagnostic Unit (LDU) 100 test heads.
Teradyne's LDU 100 core measurement head improves fault location and
enables better dispatch performance.

"Teradyne is proud to have reached this milestone of project
completion. It represents the culmination of a complex upgrade program
of our central computing systems and remote test heads without
interruption to the day-to-day operations of Belgacom's Customer Call
Centers. Jointly, with Belgacom personnel, Teradyne delivered the
project on time and with the latest system modifications enabling
Belgacom to improve their repair process," said Grant Cushny,
Teradyne's divisional general manager.

About the Broadband Test Group

Teradyne's Broadband Test Group develops state-of-the-art testing
capabilities to help service providers more rapidly sell and deploy
broadband services and improve the efficiency of qualification,
provisioning, and customer care for DSL and voice networks. Teradyne's
30+ years of industry-leading background in layer one testing has
created solutions that support 150 million voice lines and 60 million
DSL lines worldwide. Learn more at www.teradyne.com/btd.

About Teradyne, Inc.

Teradyne (NYSE:TER) is a leading supplier of Automatic Test
Equipment used to test complex electronics for the consumer
electronics, automotive, computing, telecommunications, and aerospace
and defense industries. In 2006, Teradyne had sales of $1.38 billion,
and currently employs about 3,800 people worldwide. For more
information, visit www.teradyne.com. Teradyne(R) is a registered
trademark of Teradyne, Inc. in the U.S. and other countries. All
product names are trademarks of Teradyne, Inc. (including its
subsidiaries) or their respective owners.

About Belgacom

Belgacom is devoted to the development of e-services and to
providing a comprehensive range of innovative telecommunications
applications and services. The Belgacom Group (BELG), quoted on
Euronext Brussels since March 2004, posted a total revenue of EUR 6.1
billion for the financial year ending 31 December 2006. Belgacom
Belgian's leading provider in the field of integrated
telecommunications services. With a history as the country's incumbent
operator, the Belgacom Group, through its strong brands of Belgacom,
Proximus, Telindus and Skynet, has developed a complete range of
products and services. Thanks to its 18,000-strong workforce, its
expertise in fixed and mobile networks and its capacity to innovate,
it is able to provide reliable, high-quality services to all its
customers - whether they are private individuals, professionals,
companies or organizations. Belgacom, Proximus, Telindus and Skynet
are trademarks of Belgacom Group.