During lockdown i've been building wifi modems inside old 56k modems. I have so far saved 7 modems from the ewaste and shipped them to my friends. You can't even tell from
How A Dial-up Modem Handshake Works | Hackaday
Dial-up Internet access - Wikiwand
The Diamond Rio PMP300: Can this classic 18-year-old MP3 player still cut it? | Ars Technica
It would take over 20 minutes to load the Google homepage with this modem. : r/vintagecomputing