Emergency Telephone System SOS 512
During the years 1972-1979 the road and telecommunication authorities in Finland carried out an investigation with the aim of determining the need for alarm telephones along public roads, and the properties an emergency telephone system should have
During the years 1972-1979 the road and telecommunication authorities in Finland carried out an investigation with the aim of determining the need for alarm telephones along public roads, and the properties an emergency telephone system should have