Recently, just for fun, and after having a chat with some people about dial up internet, I figured there should be a way to set up a dial up (or in correct terms, a dial in) server to recreate how for most people the Internet used to work in a small scale. I already had a phone exchange that could be used to generate a dial tone and to connect two modems together, so I started reading up. After reading some Linux guides, just for fun, I took my Sonnet Encore upgraded PowerMac G4 Quicksilver, installed Ubuntu Server 14 (Debian, or any other Linux version would have worked as well, as all that was needed is the command line interface), and followed some guides. I eventually do plan on writing my own, as I had to refer to several guides and forum posts to get it working, as some information was out of date. But, with a little utility called mgetty, as well as the ppp utility, I got it to work, and here is the videographic evidence! 
The Clamshell iBook is on the second internal line of the phone exchange, and the Quicksilver on the fourth. So, the Clamshell dials 4 to connect to the Quicksilver, and then the (in?)famous dial up sound is heard, and the Quicksilver forwards its Ethernet connection to the Clamshell via the phone line, allowing it to go online. I then browse to a dial up friendly website, countrybus.org, recommended to me by @LightBulbFun, which slowly but surely loads. I plan on eventually redoing this setup on a Transmeta Crusoe based HP thin client, as it's completely silent and is far less power hungry than the PowerMac, for those moments I want to browse the World Wide Web like it's 1999, but it was fun getting this to work with only PowerPC based hardware.
