Network communications firm Nokia Siemens Networks has signed a deal with the Valad German Aktiv fund, managed by the Valad Property Group, to take 17,000m[sup]2[/sup] of office, high tech and warehouse space in Dusseldorf. The joint venture company will move into Heltorfer Strasse 20 - 22, situated on a business park close to Dusseldorf airport on a five year lease paying EUR 2.5mln per annum, the company said in its statement.