In case you don't already know, there are two ways to make a dialup modem:
- 1. The hardware modem, which is purpose-built and can do nothing else.
2. The software modem, aka winmodem, which, as far as I can figure it, is a program that generates all the required waveforms and feeds them tthrouh a fairly high-powered audio amplifier, the output of which is connected to the phone line.