Eltrona Interdiffusion S.A. is a telecommunications provider offering fibre ultra-high-speed Internet, HDTV and fixed & mobil ... e telephony services to the residential, professional and institutional markets in Luxembourg. Eltrona has its own fibre and cable network infrastructure and covers 85% of the population of the Grand Duchy. The company has been present on the Luxembourgish market since its inception in 1969. Eltrona Security Systems S.A. is a wholly owned subsidiary of Eltrona Interdiffusion S.A. read more