UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of March, 2007
SPIRENT COMMUNICATIONS plc
_____________________________________________________________________
(Translation of registrant's name into English)
Spirent House, Crawley Business Quarter, Fleming Way, Crawley, West Sussex
RH10 9QL, UK.
_____________________________________________________________________
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.
Form 20-F X Form 40-F.....
Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
Yes ..... No X
If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ________
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
MR ALEX WALKER
4. State whether notification relates to a person connected with a person
discharging managerial responsibilities/director named in 3 and identify the
connected person
ALSO RELATES TO MRS ELIZABETH WALKER
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
JOINT BENEFICIAL HOLDING WITH HIS WIFE REFERRED TO 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
NY NOMINEES
8 State the nature of the transaction
PURCHASE OF SHARES IN THE MARKET
9. Number of shares, debentures or financial instruments relating to shares
acquired
30,000 ORDINARY SHARES OF 3&1/3 PENCE
10. Percentage of issued class acquired (treasury shares of that class should
not be taken into account when calculating percentage)
0.003%
11. Number of shares, debentures or financial instruments relating to shares
disposed
N/A
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
60 PENCE PER SHARE
14. Date and place of transaction
14 MARCH 2007, LONDON
15. Total holding following notification and total percentage holding following
notification (any treasury shares should not be taken into account when
calculating percentage)
30,000 SPIRENT COMMUNICATIONS PLC ORDINARY SHARES OF 3&1/3 PENCE (0.003% OF THE
ISSUED SHARE CAPITAL EXCLUDING TREASURY SHARES)
16. Date issuer informed of transaction
14 MARCH 2007
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
24. Name of contact and telephone number for queries
WARREN NASH
Tel: 01293 767676
Name and signature of duly authorised officer of issuer responsible for making
notification
WARREN NASH, SHARE PLANS MANAGER
Date of notification
15 MARCH 2007
Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.
______MICHAEL ANSCOMBE______
(Registrant)
Date: 15 March, 2007 By ____/s/ Michael Anscombe____
(Signature)*