Press Release

NMS Communications Selects Teradyne Connection Systems As Wired Equipment Partner

Teradyne to Supply EMS Services for NMS Voice Quality System Offerings

Nashua, NH - May 5, 2003 - Teradyne, Inc. (NYSE: TER) Connection Systems Division (TCS), a leading provider of high-speed, high-density connectors, high-performance circuits, and electronic manufacturing services, and NMS Communications (Nasdaq: NMSS), trusted supplier of communications products and services, today announced that they have entered into an outsourcing partnership agreement whereby NMS will consolidate all wired equipment manufacturing with Teradyne. Teradyne will provide EMS services including high performance integrated chassis for NMS Communication's voice quality systems installed worldwide.

"As NMS strives to bring technology-leading products to market quickly at the lowest cost for our customers, the choice of supply chain partners is critical to our success. Teradyne provides us with a wide breadth of technology solutions and experience in complex systems integration," said Herb Shumway, vice president of NMS' Supply Chain Operations. "We looked at the market for high-performance system components, such as backplanes and enclosures, and Teradyne was clearly the best choice."

Teradyne has been working with NMS since the early stages of its move into the voice quality systems business, providing design and applications engineering services to the company, and shipping the first products in early 2002. As part of this expanded outsourcing agreement, Teradyne will now provide all electro-mechanical integration, program management and test services for NMS' voice quality systems. Volume shipment of wired products as part of this expanded relationship began in the first quarter of 2003.

According to Bill Doherty, EMS Business Unit Manager, Teradyne Connection Systems, "the missions of Teradyne and NMS Communications are highly complementary - meet the expectations of our customers by bringing leading-edge technology to market fast at the lowest cost of acquisition. We are pleased to be selected as the wired equipment partner for NMS and will be working very closely with their team throughout the products' life-cycle to exceed these expectations."

About Teradyne Connection Systems
Teradyne Connection Systems (TCS), a division of Boston-based Teradyne, Inc. provides total system solutions to industry leading OEMs, with high-performance circuits, high-speed, high-density connectors, multi-gigabit backplane assemblies and complete system integration and test services. Leading manufacturers of communications and computing systems central to communicating, storing and using information use Teradyne's components and electronic manufacturing services to meet their demanding technology, reliability and time-to-market requirements. For more information visit http://www.teradyne.com/tcs.

About Teradyne Inc.
Teradyne (NYSE:TER) is the world's largest supplier of Automatic Test Equipment, and is also a leading supplier of interconnection systems. The company's products deliver competitive advantage to the world's leading semiconductor, electronics, automotive and network systems companies. In 2002, Teradyne had sales of $1.22 billion, and employed about 7000 people worldwide. For more information, visit http://www.teradyne.com.

About NMS Communications
NMS Communications (Nasdaq: NMSS) helps its customers increase revenues and returns on investments by rapidly deploying new carrier-grade communications products and services. Every telecom operator and communications equipment provider on the Global Fortune 50 list relies on NMS Communications for technology-leading products and services, including system building blocks, systems, consulting, and support. Visit http://www.nmscommunications.com for more information.