Up until home broad band came into existence the only way to access the internet at home was to get your modem to call the ISP's phone number and listen to the unpleasant sound that would happen. 
In this video we look at the history and technology of dial-up ISPs and build one our self.

This video is sponsored by PCBWay (https://www.pcbway.com). 

Johnny Blanchard re-enthused https://www.youtube.com/c/ReEnthused
Retro Princess https://www.youtube.com/c/RetroPrincess
Yesterzine https://www.youtube.com/user/Duds2k1

0:00 - Introduction
1:02 - A word from our sponsors
1:45 - Let normal service resume
3:07 - Bell 101 Modem 
3:51 - Hayes Smart Modem
7:38 - Building an ISP
8:34 - Telephone line simulator
11:05 - Building a Linux Dialup Server
14:28 - Client setup
15:34 - First test 
16:00 - Comparing our setup to a commercial one
19:36 - 56k modems & ISDN
25:50 - Radius
27:20 - Testing over the real phone network
29:59 - Free serve
34:50 - The coming of broad band
35:43 - Emergence service after the POTS switch off
37:27 - Thanks