Frankfurt (euro adhoc) -

  Notification concerning transactions by persons discharging managerial
  responsibilities pursuant to section 15a of the WpHG, transmitted by euro
  adhoc with the aim of a Europe-wide distribution. The issuer is responsible
  for the content of this announcement.

31.08.2007

Details of the person subject to the disclosure
requirement:

Name:              Peer Knauer

Reason for the disclosure requirement:

Reason:            Person performing managerial responsibilities
Position:          Member of a managing body

Details of the transaction:
Description of financial instrument: Aktie

ISIN:                DE000A0M2ZK2
Type of transaction: purchase
Date:                31.08.2007
No of items:         17175
Currency:            Euro
Price:               11.64000
Total amount traded: 199,917.00
Place:               Frankfurt
Explanation:

Issuer subject to the publication requirement:

end of announcement                               euro adhoc 31.08.2007 16:48:18

Further inquiry note:

Branche: Telecommunications Equipment
ISIN: DE000A0M2ZK2
WKN: AOM2ZK
Index: CDAX, Prime All Share, Technologie All Share
Börsen: Börse Frankfurt / official dealing/prime standard