The European telecommunications sector has witnessed a period of change in the last decades. Starting with the liberalisation process of the 1990s, the successive introduction of sector-specific regulation has resulted in a move from state-owned monopolies to privatisation and competition in the industry. Presented as a temporary instrument, the sectoral regime was intended to phase out and gradually be replaced by general competition law as a sufficient degree of competition emerged in the markets. Such transition has not taken place yet. After three decades of regulatory reforms, and a considerable degree of competition has emerged in most telecommunications markets, the sector now faces new challenges. In particular, telecommunicatio...