The CPM of Malaga, based in the Secondary Substation, based its communications system fundamentally on radio. This equipment, from the ENSA brand, along with others located in strategic centers in the province configured in a star, were the first to adapt to operate in continuous transmission. Together with the achievement of a flat response for data transmission, centered around 2800 Hz, they were one of the great achievements in the collaboration of our technicians with those of the supplying company.