Complex sentence: On the 31st December 2013, sipgate ceased operations in Austria citing negative regulatory restrictions imposed by the Austrian Telecommunications Regulator, which imposed rulings that a company can only supply a telephone number to a property if they also supply the associated cabling.
Split into simpler sentences: On the 31st December 2013, the company's Austrian operations were ceased citing negative regulatory restrictions imposed by the Austrian Telecommunications Regulator. The RTR imposed rulings that a company can only supply a telephone number to a property if they also supply the associated cabling.