The sound of the dialup, pictured

If you ever connected to the Internet before the 2000s, you probably remember that it made a peculiar sound. But despite becoming so familiar, it remained a mystery for most of us. What do these sounds mean? (The audio was recorded by William Termini on his iMac G3.) As many already know, what you're hearing is often called a handshake, the start of a telephone conversation between two modems. The

[causeless]

"@abagames ダイアルアップのピーーガーーー音がそれぞれ何をやっているかの解…" via https://twitter.com/abagames/status/928245550318723074

[ABA]

ダイアルアップのピーーガーーー音がそれぞれ何をやっているかの解説図

[nezuku]

アナログモデムのネゴシエーションをスペクトラムで可視化とどんなことをしているのかを解説 こちらの動画と併せて見るとわかりやすい https://www.youtube.com/watch?v=abapFJN6glo

[asahiko]

modem sound モデムの音の謎