Originally a division of the Ministry of Post, Telephone and Telegraph, what would become the ETC was established as the Imperial Board of Telecommunications of Ethiopia (IBTE) by proclamation No. 131/52 in 1952. Under the Derg Regime, the IBTE was reorganized as the Ethiopian Telecommunications Service in October 1975, which was in turn reorganized in January 1981 as the Ethiopian Telecommunications Authority. In November 1996, the Ethiopian Telecommunications Authority became ETC by Council of Ministers regulation No. 10/1996. The subsequent Proclamation 49/1996 expanded the ETC's duties and responsibilities. For its international traffic links and communication services, ETC mainly uses its earth station at Sululta which transmits and receives to both the Indian Ocean and the Atlantic Ocean satellites. Engineering consulting firm Arup, were involved in the design and engineering of the early tower structures (during the 1970s).