In the early forties of the 20th century, Western Union has used the first time a commercial intercity microwave transmission system. In 1935, Western Union has put into operation first intercity fax communication. Most service points of Western Union work in the time convenient for customers throughout the week and throughout the year. In the early 60s Western Union has put into operation transcontinental microwave system of data transmission via radio waves, completely replacing the web of telegraph poles and wires. Sibley, the founder of Western Union, did not build a new telegraph lines, and persuaded the other players to join. American Telegraph Company, however, still had to buy it.