Spirent Demonstrates World's First Platform for Closed Loop CDMA2000 1xEV-DO Access Terminal Testing.

Business Editors/Hi-Tech Writers

NetWorld+Interop 2002 Las Vegas

LAS VEGAS--(BUSINESS WIRE)--May 7, 2002

Integrated Wireless Data Terminal Performance Analysis Solution

Accelerates the Profitability of 3G Networks

Spirent Communications, a wholly owned business group of Spirent plc (NYSE:SPM), today demonstrates its solution for end-to-end closed loop performance analysis of CDMA2000 1xEV DO Access Terminals (ATs) at Networld + Interop2002 in Las Vegas, booth 6089. Spirent has combined its wireless network and RF impairment emulation expertise with its high-speed, high-density data traffic generation and analysis instruments to comprehensively analyze the performance of next generation wireless terminals. All the components necessary to simulate a real-world CDMA2000 1xEV-DO environment have been integrated into a controlled, repeatable test platform for R&D and design verification applications to simplify customers' test, evaluation and performance analysis processes.

"As a key factor in ensuring customer satisfaction with new revenue-generating data services, carriers planning to deploy 1xEV-DO need assurance that the access terminals they offer will perform in the real-world" said Christine Laredo, senior analyst, Mobile Wireless Research at the Strategis Consulting Group.

CDMA2000 1xEV-DO enables "always on" data to be sent over PCS and cellular wireless networks, using mobile Access Terminals, at speeds comparable to DSL or cable modems. CDMA2000 1xEV-DO provides peak data rates up to 2.4 Megabits per second (Mbps), which support demanding applications such as streaming video and large file downloads.

Spirent's AirAccess EV is the world's first commercially available, integrated test platform for CDMA2000 1xEV-DO Access Terminals (ATs). Based on proven QUALCOMM(R) technology, AirAccess EV is an evolution of Spirent's highly successful AirAccess C2K CDMA Network Emulation product line. Feature-rich, real-time network emulation enables both functional and protocol testing of ATs that exploit CDMA2000 1xEV's high-speed, high capacity wireless Internet capability.

The closed loop Spirent system combines AirAccess EV, TAS4500 and SMB-600 to provide high-speed data traffic analysis over an emulated CDMA network with RF impairments. AirAccess provides real-time emulation of a CDMA2000 1xEV-DO network. Spirent's TAS4500 adds real-world radio channel emulation with programmable multi-path fading characteristics. The SMB-600 provides high-speed network performance analysis capabilities, including throughput, latency and frame loss metrics.

Spirent's solution provides the necessary tools for carriers to characterize and select the optimal devices to deploy on their networks and at the same time enables wireless terminal manufacturers to maximize the data transfer performance of their AT devices.

A high-resolution image file of this product can be downloaded from tas.spirentcom.com/news_images.htm.

About Spirent Communications(TM)

Spirent Communications is a worldwide provider of integrated performance analysis and service assurance systems for next-generation network technologies. Spirent's solutions accelerate the profitable development and deployment of network equipment and services by emulating real-world conditions in the lab and assuring end-to-end performance of large-scale networks. www.spirentcom.com

Spirent Communications is a wholly owned subsidiary of Spirent plc, an international network technology company. Spirent plc is listed on the London Stock Exchange (ticker: SPT). The company is also listed on the New York Stock Exchange (ticker: SPM; CUSIP number: 84856M209). www.spirent.com

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