Spirent Buys ImperfectSpirent Buys Imperfect

LONDON -- Spirent Communications plc (“Spirent”) (LSE: SPT; NYSE: SPM), a leading communications technology company, today announces that it has acquired the business of Imperfect Networks, Inc. (“Imperfect Networks”), a US based developer of security testing solutions. The acquisition will enable Spirent to deliver enhanced security testing solutions to its customers across a number of markets.

Spirent is paying an initial consideration of $4.0 million (£2.2 million), payable in cash on completion, with up to a further $4.0 million (£2.2 million) payable depending on the satisfaction of certain technical milestones and revenues to be achieved in 2007. Imperfect Networks is based in Massachusetts and has 11 employees.

Spirent has been the exclusive re-seller of Imperfect Networks’ ThreatEx product since 2005 with revenues growing strongly in the first half of this year. When combined with Spirent’s market-leading AvalancheTM product, it provides global network equipment manufacturers, service providers and enterprises with a powerful tool for verifying defenses against malicious attacks and helps reduce the risk of costly network downtime due to network threats such as worms, viruses and attacks on voice over IP and wireless LAN services. The ThreatEx business and technology will be integrated into Spirent’s Performance Analysis division.

Anders Gustafsson, Chief Executive, commented:

“The acquisition is in line with our strategy to expand our communications business, drive profitable growth and deliver shareholder value. Our major customers are increasingly demanding enhanced security testing solutions. Combining the ThreatEx technology with our existing solutions will strongly position us to meet their needs.”

Spirent Communications plc (NYSE: SPM; London: SPT)