Acoustically coupled modem, 1980s. by Exton, David at Science and Society Picture Library
1980 computer equipment, looks like early fax or modem via phone line Stock Photo - Alamy
VIC-20 Phone Home: The Commodore VICModem - Paleotronic Magazine
What were computers used for in the eighties? Why would people pay 5 grand for a fancy typewriter? What were modems used for before the internet arose? - Quora
IBM 3865-2 1980s Vintage Data Modem for Mainframe Terminal System | RecycledGoods.com
What were your longest single usage or transfer of data using an audio-coupled modem, what was it's speed and what were the circumstances? - Quora