Spirent Communications plc announces Notice of Results


Crawley, UK -- (MARKET WIRE) -- January 19, 2007 --SPIRENT COMMUNICATIONS PLC

NOTIFICATION OF DATE OF 2006 PRELIMINARY RESULTS

London, UK - 19 January 2007: Spirent Communications plc (LSE: SPT; NYSE: SPM), a leading communications technology company, announces that it intends to release its preliminary results for the year to 31 December 2006 on Thursday 1 March 2007 before the opening of the UK market.

The Company will host a results presentation at 09.15 for 09.30 UK time on Thursday 1 March 2007 at the Auditorium, JPMorgan Cazenove Limited, 20 Moorgate, London, EC2R 6DA.

A simultaneous webcast of the presentation will be available in the Investors section of the Spirent Communications plc website at www.spirent.com.

If you or a colleague would like to attend the presentation, please email Frances Simm at frances.simm@spirent.com or call her on 01293 767676.


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Enquiries
Eric Hutchinson,    Spirent Communications plc    +44 (0)1293 767676

Chief Financial Officer

Reg Hoare           Smithfield                    +44 (0)20 7360 4900
Libby Young
About Spirent Communications plc

Spirent Communications plc is a leading communications technology company focused on delivering innovative systems and services to meet the needs of customers worldwide. We are a global provider of performance analysis and service assurance solutions that enable the development and deployment of next-generation networking technologies such as broadband services, Internet telephony, 3G wireless and web applications and security testing. The Systems group develops power control systems for specialist electrical vehicles in the mobility and industrial markets. Further information about Spirent Communications plc can be found at www.spirent.com.

Spirent Communications plc Ordinary shares are traded on the London Stock Exchange (ticker: SPT) and on the New York Stock Exchange (ticker: SPM; CUSIP number: 84856M209) in the form of American Depositary Shares (ADS), represented by American Depositary Receipts, with one ADS representing four Ordinary shares.

Spirent and the Spirent logo are trademarks or registered trademarks of Spirent Communications plc. All other trademarks or registered trademarks mentioned herein are held by their respective companies. All rights reserved.

This press release may contain forward-looking statements that are based on current expectations or beliefs, as well as assumptions about future events. By their nature, forward-looking statements are inherently predictive, speculative and involve risk and uncertainty because they relate to events and depend on circumstances that will occur in the future. You should not place undue reliance on these forward-looking statements, which are not a guarantee of future performance and are subject to factors that could cause our actual results to differ materially from those expressed or implied by these statements. These risks include the risks described from time to time in Spirent Communications plc's Securities and Exchange Commission periodic reports and filings. The Company undertakes no obligation to update any forward-looking statements contained in this press release, whether as a result of new information, future events or otherwise.

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