Thalys is the name for the international high speed rail services that operate between Paris, Brussels, Amsterdam, and Cologne. Thalys trains are jointly owned and operated by SNCF (France), NMBS/SNCB (Belgium), Deutsche Bahn (Germany), and Nederlandse Spoorwegen (Netherlands). The trains themselves are TGV trains, modified to handle the different power voltages on each country's tracks. PBA trainsets are modified TGV Réseau trainsets and can only operate between Paris, Brussels, and Amsterdam. PBKA trainsets are single level TGV Duplex trainsets and can operate to all Thalys destinations. The acronyms that form the train type names originate with the cities that each trainset can serve. Thalys services began on June 2, 1996.