Museum of Portable Sound - The sounds of a dialup modem connecting to the internet are actually a language, and the sounds are a conversation between two 20th century-era machines. Listen along
How A Dial-up Modem Handshake Works | Hackaday
How to disable dialing sounds and noise from a modem
Stream dial-up modem connecting to internet sound by KPwatershed | Listen online for free on SoundCloud
Dial-Up Modem Sound | What Was That Dial-Up Internet Sound?
Dial Up Modem Handshake Sound - Spectrogram : r/ScienceNcoolThings
Retro Modem Sound Board Effects:Amazon.com:Appstore for Android