https://marco.org/2007/11/11/the-most-critical-component-of-course-will-be
The most critical component, of course, will be the modem that connects your machine to the phone system. Look for a system that comes with an internal 28.8 kilobit-per-second modem. It will cost more, but it will reduce phone charges and save you the annoyance of waiting for graphics-rich Web pages to slowly materialize on your screen.