Director/PDMR Shareholding

Spirent Communications PLC
14 August 2006

NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL
RESPONSIBILITY OR CONNECTED PERSONS

This form is intended for use by an issuer to make a RIS notification required
by DR 3.1.4R(1).


(1)      An issuer making a notification in respect of a transaction relating to the shares or debentures
         of the issuer should complete boxes 1 to 16, 23 and 24.


(2)      An issuer making a notification in respect of a derivative relating to the shares of the issuer
         should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and 24.


(3)      An issuer making a notification in respect of options granted to a director/person discharging
         managerial responsibilities should complete boxes 1 to 3 and 17 to 24.


(4)      An issuer making a notification in respect of a financial instrument relating to the shares of
         the issuer (other than a debenture) should complete boxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and
         24.





Please complete all relevant boxes in block capital letters.



1. Name of the issuer



SPIRENT COMMUNICATIONS PLC



2. State whether the notification relates to (i) a transaction notified in
accordance with DR 3.1.4R(1)(a); or

(ii) DR 3.1.4(R)(1)(b) a disclosure made in accordance with section 324 (as
extended by section 328) of the Companies Act 1985; or

(iii) both (i) and (ii)



(iii) THIS NOTIFICATION IS MADE IN ACCORDANCE WITH BOTH



3. Name of person discharging managerial responsibilities/director



ANDERS GUSTAFSSON



4. State whether notification relates to a person connected with a person
discharging managerial responsibilities/director named in 3 and identify the
connected person



N/A



5. Indicate whether the notification is in respect of a holding of the person
referred to in 3 or 4 above or in respect of a non-beneficial interest



IN RESPECT OF THE BENEFICIAL HOLDING OF ANDERS GUSTAFSSON



6. Description of shares (including class), debentures or derivatives or
financial instruments relating to shares



SPIRENT COMMUNICATIONS PLC ORDINARY SHARES OF 3&1/3 PENCE

7. Name of registered shareholders(s) and, if more than one, the number of
shares held by each of them



ANDERS GUSTAFSSON



8 State the nature of the transaction



PURCHASE OF SHARES



9. Number of shares, debentures or financial instruments relating to shares
acquired



50,000



10. Percentage of issued class acquired (treasury shares of that class should
not be taken into account when calculating percentage)



0.0054%



11. Number of shares, debentures or financial instruments relating to shares
disposed



NIL



12. Percentage of issued class disposed (treasury shares of that class should
not be taken into account when calculating percentage)



N/A



13. Price per share or value of transaction



44 PENCE PER SHARE



14. Date and place of transaction



11 AUGUST 2006 - LONDON, UNITED KINGDOM



15. Total holding following notification and total percentage holding following
notification (any treasury shares should not be taken into account when
calculating percentage)



BENEFICIAL HOLDING: 100,000 SPIRENT COMMUNICATIONS PLC ORDINARY SHARES OF 3&1/3
PENCE (0.0107% OF THE ISSUED SHARE CAPITAL EXCLUDING TREASURY SHARES)

NON-BENEFICIAL HOLDING: 180,180 SPIRENT COMMUNICATIONS PLC ORDINARY SHARES OF 3&
1/3 PENCE (0.0194% OF THE ISSUED SHARE CAPITAL EXCLUDING TREASURY SHARES)

TOTAL HOLDING (BOTH BENEFICIAL & NON-BENEFICIAL): 280,180 SPIRENT COMMUNICATIONS
PLC ORDINARY SHARES OF 3&1/3 PENCE (0.0302% OF THE ISSUED SHARE CAPITAL
EXCLUDING TREASURY SHARES)



16. Date issuer informed of transaction



11 AUGUST 2006



If a person discharging managerial responsibilities has been granted options by
the issuer complete the following boxes





17 Date of grant



N/A



18. Period during which or date on which it can be exercised



N/A



19. Total amount paid (if any) for grant of the option



N/A



20. Description of shares or debentures involved (class and number)



N/A



21. Exercise price (if fixed at time of grant) or indication that price is to be
fixed at the time of exercise



N/A



22. Total number of shares or debentures over which options held following
notification



N/A



23. Any additional information

N/A







24. Name of contact and telephone number for queries



MICHAEL ANSCOMBE

Tel: [phone]



Name and signature of duly authorised officer of issuer responsible for making
notification



MICHAEL ANSCOMBE

DEPUTY COMPANY SECRETARY



Date of notification



14 AUGUST 2006




END



NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL
RESPONSIBILITY OR CONNECTED PERSONS

This form is intended for use by an issuer to make a RIS notification required
by DR 3.1.4R(1).


(1)      An issuer making a notification in respect of a transaction relating to the shares or debentures
         of the issuer should complete boxes 1 to 16, 23 and 24.


(2)      An issuer making a notification in respect of a derivative relating to the shares of the issuer
         should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and 24.


(3)      An issuer making a notification in respect of options granted to a director/person discharging
         managerial responsibilities should complete boxes 1 to 3 and 17 to 24.


(4)      An issuer making a notification in respect of a financial instrument relating to the shares of
         the issuer (other than a debenture) should complete boxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and
         24.





Please complete all relevant boxes in block capital letters.



1. Name of the issuer



SPIRENT COMMUNICATIONS PLC



2. State whether the notification relates to (i) a transaction notified in
accordance with DR 3.1.4R(1)(a); or

(ii) DR 3.1.4(R)(1)(b) a disclosure made in accordance with section 324 (as
extended by section 328) of the Companies Act 1985; or

(iii) both (i) and (ii)



(iii) THIS NOTIFICATION IS MADE IN ACCORDANCE WITH BOTH



3. Name of person discharging managerial responsibilities/director



ERIC HUTCHINSON



4. State whether notification relates to a person connected with a person
discharging managerial responsibilities/director named in 3 and identify the
connected person



RELATES TO ERIC HUTCHINSON, ROSEMARIE HUTCHINSON, LYDIA HUTCHINSON & CHARLOTTE
HUTCHINSON



5. Indicate whether the notification is in respect of a holding of the person
referred to in 3 or 4 above or in respect of a non-beneficial interest



ALL ARE IN RESPECT OF THE BENEFICIAL HOLDINGS OF ERIC HUTCHINSON AND THE
CONNECTED PERSONS DETAILED ABOVE



6. Description of shares (including class), debentures or derivatives or
financial instruments relating to shares



SPIRENT COMMUNICATIONS PLC ORDINARY SHARES OF 3&1/3 PENCE



7. Name of registered shareholders(s) and, if more than one, the number of
shares held by each of them



BARCLAYS NOMINEES LIMITED



8 State the nature of the transaction



PURCHASE OF SHARES



9. Number of shares, debentures or financial instruments relating to shares
acquired



118,024



10. Percentage of issued class acquired (treasury shares of that class should
not be taken into account when calculating percentage)



0.0127%



11. Number of shares, debentures or financial instruments relating to shares
disposed



NIL



12. Percentage of issued class disposed (treasury shares of that class should
not be taken into account when calculating percentage)



N/A



13. Price per share or value of transaction



ERIC HUTCHINSON:

11,170 SHARES @ 44.43 PENCE PER SHARE

21,604 SHARES @ 44.25 PENCE PER SHARE



ROSEMARIE HUTCHINSON

50,738 SHARES @ 44.25 PENCE PER SHARE



LYDIA HUTCHINSON

25,482 SHARES @ 44.19 PENCE PER SHARE



MINOR CHILD

9,030 SHARES @ 44.23 PENCE PER SHARE



14. Date and place of transaction



11 AUGUST 2006 - LONDON, UNITED KINGDOM



15. Total holding following notification and total percentage holding following
notification (any treasury shares should not be taken into account when
calculating percentage)



871,731 SPIRENT COMMUNICATIONS PLC ORDINARY SHARES OF 3&1/3 PENCE (0.0936% OF
THE ISSUED SHARE CAPITAL EXCLUDING TREASURY SHARES)



16. Date issuer informed of transaction



11 AUGUST 2006



If a person discharging managerial responsibilities has been granted options by
the issuer complete the following boxes





17 Date of grant



N/A



18. Period during which or date on which it can be exercised



N/A



19. Total amount paid (if any) for grant of the option



N/A



20. Description of shares or debentures involved (class and number)



N/A



21. Exercise price (if fixed at time of grant) or indication that price is to be
fixed at the time of exercise



N/A



22. Total number of shares or debentures over which options held following
notification



N/A



23. Any additional information

N/A



24. Name of contact and telephone number for queries



MICHAEL ANSCOMBE

Tel: [phone]



Name and signature of duly authorised officer of issuer responsible for making
notification



MICHAEL ANSCOMBE

DEPUTY COMPANY SECRETARY



Date of notification



14 AUGUST 2006




END




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