Walnut Creek, CA--January 19, 1998 -- Teradyne, Inc. today announced an order for its high-accuracy, DSP-based analog measurement system called PRISM-ZTM (Precision Integrated Signal Measurement) from 3COM, a leading designer and supplier of network interfaces. 3COM ordered 30 PRISM-Z upgrades for the Z1890 circuit board test systems currently installed in their Morton Grove, IL facility. All upgrade packages were delivered and installed in Q4 1997.

The 30 Z1890 test systems installed at 3COM's IL facility are used for testing complex boards found in analog modems. Randy Bird, 3COM's In-Circuit Test Manager, said, "In our high volume production environment, we're constantly looking for ways to save time on our testing stage. With the PRISM-Z modules, we achieve an increase in throughput and accuracy in testing small value capacitors. The modules allow us to reduce test times by over 40% and increase the measuring accuracy of our components. As a result, we've been able to increase our manufacturing capacity."

Joe Wrinn, General Manager at Teradyne's Assembly Test Division in Walnut Creek, CA, said, "We are pleased to be working with the world leader in networking technology. We will continue to support 3COM's product and technology portfolio as they grow into the 21st century."

The PRISM-Z analog module delivers state-of-the-art precision, throughput, stability, and measurement flexibility for all Z1800-Series test systems. The PRISM-Z module features industry-leading precision for analog in-circuit and functional test. The PRISM-Z provides greater range and accuracy, especially for small capacitors, small and large inductors, and RC combinations. Throughput and repeatability are greatly enhanced with the PRISM-Z. The PRISM-Z offers better stability across a wider range of operating temperatures and improved transportability of programs between systems.

Teradyne is a leading manufacturer of automatic test equipment and connection systems for the electronics and telecommunications industries, with headquarters in Boston, Massachusetts. Teradyne1s Assembly Test Division in Walnut Creek produces circuit-board inspection and test systems. More than 2,200 Z1800-Series systems have been sold worldwide to 600 customer sites in 40 countries. Teradyne's site on the World Wide Web is at www.teradyne.com. Teradyne is listed on the New York Stock Exchange (Symbol: TER). Sales in the first three quarters of 1997 were approximately $875 million.

3COM Corporation enables individuals and organizations worldwide to communicate and share information and resources at anytime from anywhere. As one of the world's preeminent suppliers of data, voice and video communications technology, 3COM has delivered networking solutions to more than 100 million customers worldwide. With global reach and local touch, the company provides enterprises, network service providers and carriers, small businesses and consumers with comprehensive, innovative information access products and system solutions for building intelligent, reliable and high performance local and wide area networks. 3COM has worldwide revenues of approximately $6.0 billion and employs about 13,200 employees in 45 countries.

PRISM is a trademark of Teradyne, Inc.