An article in the November 1957 discusses the technical issues in the speed and accuracy of data transmission over private lines. It recognizes that the telephone network was built for voice, not data. Various modulating and carrier modes are considered such as "AM double sideband" and "frequency shift transmission". 1600 bits per second was deemed a good speed at that time. (and the term "bit" was used then.) Line noise, delay distortion, and required terminal equipment were critical issues that needed to be addressed. The article gets quite technical.
12 years ago