Transaction in Own Shares

Spirent Communications PLC
01 November 2006

Spirent Communications Plc

Transaction in Own Shares



Spirent Communications PLC announces that it has today purchased through
Citigroup Global Markets U.K. Equity Limited 1,000,000 ordinary shares at an
average price of 57.996 pence per share. The highest price and the lowest price
paid for these shares were 58.5 pence and 56.25 pence respectively.



Following the above purchase, Spirent Communications plc holds 84,790,000
Spirent Communications plc ordinary shares in treasury, and has 889,771,782
Spirent Communications plc ordinary shares in issue (excluding treasury shares).





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