Viking 56K External Modem (Serial) – Apple Rescue of Denver
Modem 56k 3Com U.S Robotics - YouTube
RetroTech Chris on Twitter: "Testing out my "new" US Robotics 56K Faxmodem. Dialed up the Diamond Mine BBS. Sound on if you like modem sounds. https://t.co/4yoKUNi1ji" / Twitter