Old Modem Internet Connection Sound Effects - YouTube
Freesound - "56k Modem.mp3" by BlueNeon
People are making dial-up noises on Tumblr to honour the internet's 56K past | CBC News
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