Total Voting Rights

Spirent Communications PLC
01 November 2007


                           SPIRENT COMMUNICATIONS PLC

                        TOTAL VOTING RIGHTS AND CAPITAL


London, UK - 1 November 2007: Spirent Communications plc ("the Company") (LSE:
SPT), a leading communications technology company, would like to notify the
market in accordance with the Financial Services Authority's ("FSA") Disclosure
and Transparency Rules of the following information as at 31 October 2007:

The Company's issued share capital consisted of 890,312,765 ordinary shares of 3
& 1/3 pence with voting rights.  The Company held 40,140,916 ordinary shares in
Treasury, and the Company is not permitted to exercise voting rights in respect
of those ordinary shares.  Therefore, the total number of voting rights in the
Company was 850,171,849.

The above figure (850,171,849) may be used by shareholders as the denominator
for the calculations by which they will determine if they are required to notify
their interest in, or a change to their interest in, the Company under the FSA's
Disclosure and Transparency Rules.


                                    - ends -


Enquiries

Michael Anscombe          Spirent Communications plc       [phone]
Company Secretary

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).  The Company operates a Level 1 American Depositary
Receipt ("ADR") programme with each ADR representing four Spirent Communications
plc Ordinary shares.  The ADRs trade in the US over-the-counter market under the
symbol SPMYY and the CUSIP number is 84856M209.

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 document may contain forward-looking statements which are made in good
faith and are based on current expectations or beliefs, as well as assumptions
about future events.  You can sometimes, but not always, identify these
statements by the use of a date in the future or such words as "will",
"anticipate", "estimate", "expect", "project", "intend", "plan", "should",
"may", "assume" and other similar words.  By their nature, forward-looking
statements are inherently predictive and 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.  The Company undertakes no
obligation to update any forward-looking statements contained in this document,
whether as a result of new information, future events or otherwise.



                      This information is provided by RNS
            The company news service from the London Stock Exchange