The invention of 1880-Al exandraGrahamBell beam transmission
1960- laser and optical fiber of the invention
1977- for the first time in the actual installation of opticalnetwork telephone
1978-FORT the first installat ion production of opt icalelectric in France
1990- optical fiber LAN and other short di stance transmissionapplicat ion
2000- to the side of the house to the table= fiber optical fiber
