SOURCE: Spirent Communications PLC

September 11, 2006 12:41 ET

Spirent Communications PLC announces Transaction in Own Shares

Crawley, UK -- (MARKET WIRE) -- September 11, 2006 --

Spirent Communications plc announces that on 11 September 2006 it purchased from JPMorgan Cazenove Limited 800,000 Spirent Communications plc ordinary shares at an average price of 46.9552 pence per share. The purchased shares will be held as treasury shares. Following the above purchase, Spirent Communications plc holds 57,890,000 Spirent Communications plc ordinary shares in treasury, and has 914,108,262 Spirent Communications plc ordinary shares in issue (excluding treasury shares).

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