NSN to supply GSM-R network to Turkish Railways September 4, 2012 | Europe Company News Nokia Siemens Networks (NSN) has bagged a project from Turkish State Railways, T.C. Devlet Demiryolları (TCDD). NSN along with technology company Thales Spain will upgrade its Global System for Mobile... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password