You may enjoy this from the awesome windytan.com, an annotated spectrum analysis and detailed description of the steps involved in a modem dialling up an ISP an

You may enjoy this from the awesome windytan.com, an annotated spectrum analysis and detailed description of the steps involved in a modem dialling up an ISP and negotiating a connection: http://www.windytan.com/2012/11/the-sound-of-dialup-pictured.html http://www.windytan.com/2012/11/the-sound-of-dialup-pictured...