Dial up modem hi-res stock photography and images - Alamy
Build a dial-up ISP server using a Raspberry Pi - Raspberry Pi
Build Your Own Dial-Up ISP – Now With Modem Pool! | Hackaday
Amazon.com: StarTech.com USB 2.0 Fax Modem - 56K External Hardware Dial Up V.92 Modem/ Dongle/Adapter - Computer/Laptop Fax Modem - USB to Telephone Jack - USB Data Modem - Network Fax/CMR/POS (USB56KEMH2) :
Getting a dial-up modem working with VoIP – Peter Mount's Blog