Sure, but that has no relevance to the original question of when modems were first used to send binary data (not text) from one computer to another over a telephone line.

Thanks for backing me on this. Western Electric was fooling around with modems back in the 1930s, as a way to multiplex several telegraph and telephone links over one set of wires. The "first" heavy use of modems was in North Africa during World War 2. The Allies kept in constant communication with the reat of the world using both landline and radio links using modems for telegraph and teletype communications. This is quite well documented. In fact, I used to have one of the modems, and I still have quite a few of the technical manuals. I think the Germans used a series of modems as well, for the same purpose. William Donzelli aw288(a)osfn.org