For those of you old enough to remember dial up internet connectivity with modems over analog telephone lines, then this episode of 'The Serial Port' might be of interest:
They investigate Multilink-PPP to see what speed improvements are possible when multiple individual analog modems connection are combined into one overall connection.
They then attempt to see how many simultaneous PPP sessions over multiple modems are possible and what speeds might be achieved! There appears to be no documentation on the upper limit for Multilink-PPP.
Can they stream YouTube 144p or 240p video over an analog connection? 🤔🤷♂️
Earlier episodes cover the telecoms hardware in more detail so don't miss those if that detail floats your boat 😁👍