In 1961, NATO asked the French army to extend the site. Since then, it is one of the 82 NATO transmission stations in Europe. This network is known as ACE High system. In this network, the Pierre-sur-Haute station, served as a relay between the Lachens station to the south, and the Mont-Août station to the north. It used four 10 kW transmitters and sixteen receivers. In 1974, the French Air Force took control of the station. In 1988, NATO began to decommission the ACE High system.