When I was a child (probably over 20 years ago) I would watch my mother transfer text documents via the computer. The modem was a device that exactly fitted the

When I was a child (probably over 20 years ago) I would watch my mother transfer text documents via the computer. The modem was a device that exactly fitted the telephone horn. So you had to pick up the phone, dial the number, then put the horn in the modem. I don't recall exactly but I think you could hear the computer "talk" to the other side. I'm not sure how different that technique is from what is posted in this article.