TST: Notice of transaction of Directors, PDMR

TST announces the notice of transaction of Directors, PDMR as follows:

1. Name of issuer: Telecommunication Technical Service JSC

2. Stock code: TST

3. Name of person discharging managerial responsibility/Director: Nguyen Duc Dong

4. Position: Vice Chairman of the Board of Directors-cum-General Manager

5. Securities type: Common stock

6. Number of shares held by the shareholder: 23,000 shares

7. Number of shares to be acquired: 3,000 shares

8. Purpose of transaction: Personal

9. Expected total holding and total percentage holding following transaction: 26,000 shares

10. Expected date of transaction: From 2/4/2009 – 29/4/2009

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