We are pleased to inform you that the 12th International Conference on Advanced Technologies, Systems and Services in Telecommunications - TELSIKS 2015 will be held from 14 to 17 October 2015, at the Faculty of Electronic Engineering, University of Nis, Serbia. Nis is an administrative, economic and cultural centre of the South-East Serbia, some 240 km away from Belgrade. This city stands on the site of the Roman settlement of Naissus, the birthplace of Emperor Constantine the Great, in the valley of the river Nišava. There is a number of the ancient monuments in the city that testify about its stormy history. Nis is known as the greatest gate between East and West, because it is on the crossroad of the three important directions of the international highway, railway and air traffic. Nis is a well-known university centre in Serbia, and Europe as well. Faculty of Electronic Engineering, one of the organisers of the conference TELSIKS and one of the most perspective university institutions in the country, gives great contribution to the development of the University of Nis.