70's
This decade began with the transfer of the central offices and could be called the Baroque stage in Telecommunications. They were years of transition and, above all, of great innovations. These are also years of continuous incorporation of workers that increase the telecommunications workforce. It is the decade of football games and convivial meals, and a time of unprecedented union activity. A time filled with very important works, all of them transcendent for the future of telecommunications, although the Maneuver Office in Borbolla stands out. The first microwave radio link takes place, whose capacity reached 12 channels. The rest of the communications are made by Carrier Waves.
The fixed and mobile radio telephone network is implemented for the operation brigades of the different transformation centers, and the AKNR automatic switchboard network is initiated. Furthermore, the Sevillian Electricity Company was a pioneer during this stage in contracting the first analogue radio links that were installed between Seville and Dos Hermanas and between Seville and Tajo de la Encantada.