Cisco - Dial-up Technology
Cisco - Dialup Technology: Overviews and Explanations Chapter 16 from the Cisco.

VOGONS - Tutorial: Setup a low-cost home dialup connection without a real telephone line
Serial Port - Cisco router: Modem ISP in a box
gekk.info - Configuring SPA122 ATA For Dial-Through
redddit - Looking for help in the (expensive) quest for at home v90 dialup
Amy Engineer - Tag: isdn protocol-emulate network
Doge Microsystems - Dial-up pool, newer version of Doge Microsystems - Dial up server.

By clabretro on YouTube:

• Homelab Dial-Up on 2024-05-18.
• Multiple Homelab Dial-up Lines on 2024-06-13.

By The Serial Port on YouTube:

• How To Start An ISP (like it's 1993) on 2023-07-22. See also:
  • The Inet-Access Frequently Asked Questions List by David H Dennis.
• SAVING a 30-year old Sun workstation! - ISP Series Episode 2 on 2023-07-29. See also:
  • sunhelp - UNIX Serial Port Resources
  • sunhelp - UNIX Serial Port Resources – Tutorials on Solaris/SunOS Modems and Terminals.
• 1.5Mbps of pure '90s: Setting up a T-1 today - ISP Series Episode 3 on 2023-09-09.
• Terminal Servers for Dial-up ISPs - ISP Series Episode 4 on 2023-10-14.
• Is our ISP ready for a beta test? - ISP Series Episode 5 on 2023-11-04.
• Configuring RADIUS for a dial-up ISP - ISP Series Episode 6 on 2024-06-15.
• Rescuing the TOTAL CONTROL from an abandoned dialup ISP on 2024-09-21.

By zefie on YouTube:

• First Home v90 (no Telco) dialup video on YouTube on 2021-07-09.
• Home v90 (No Telco) quick overview how on 2021-06-10.
• Dialup V90 at Home - Hardware Info - What I Use [ASMR?] on 2022-10-03.

YouTube - Making A Home Dialup ISP - Paul's Old Crap #3 on 2018-02-23 by Paul's Crap. Shows a PC modem → Grandstream HT701 ATA → 3CX PBX → Grandstream HT701 ATA → Cisco Router 1760 with modem WIC setup.

YouTube - Cisco Homelab Dial-Up and T1 Setup with Halo LAN Party over Dial-Up. on 2024-06-22 by RandomTech.

YouTube - Setup your own Dial-Up Networking Server with real hardware! on 2020-05-19 by c:\90s_tech. Describes a setup that dials in from a Windows 98 laptop to an ppp+mgetty Linux computer via a Linksys PAP2T ATA device and an Asterisk server.

By Gadget Reboot on YouTube:

• Phone Line Simulator Experiment on 2018-06-14. Describs getting a phone line simulator working with a 9V battery and 500 Ohms resistor.
• 56k and 33.6k Modems Connecting to Each Other with no Phone Service on 2019-09-14 Describes a setup that dials from one modem to another with both modems connected to eachother with a phone line supported with a 9V battery and resistor to get around 20mA of current so the modemd think they are connected to an actual phone line.
• Telephone Central Office Simulator on 2022-11-21.
• Phone Line Simulator - Phones and Modems Connecting (Locally) on 2023-11-12. Describes a phone line simulator PCB, and using it to dial into a local Telegard BBS.

By Cathode Ray Dude - CRD on YouTube (see also cathode ray dude dot com):

• Dialing Up At Home on 2020-12-16.
• AT&T's '60s Modem That Won't Die on 2021-06-26.
• Voice chat in the age of modems on 2023-05-04. The ASVD Microcom OfficePorte Voice modems are interesting.

YouTube - Using modems without phone lines on 2014-08-17 by FozzTexx. Uses a TDM400P PCI card in a Pentium4 Assterisk server to connect analog modems to. See also Insentricity - Using modems without phone lines.

By The Livingroom on YouTube:

• Dial Up Internet in 2021 on 2021-01-06. Uses dial-up via one of the Phone port on a Cisco SPA112 with an Apple AirPort Extreme (2nd gen) which supports dial-up connected to the other Phone port functioning as a dial-up ISP.
• Dialup Internet 1994 style, in 2021! Using the 100mhz Macintosh Performa 6300CD. on 2021-03-22.
• Reading the comments from my Dialup Internet in 2021 video on 2021-03-22.

YouTube - Playing with modems - without a phone line! on 2019-07-31 by themaritimegirl.

YouTube - How 90s dial-up Internet worked, and let's make our own ISP. on 2022-04-01, by RetroBytes.

YouTube - How to Create Your Own Dial-Up ISP Over Ethernet (LAN) Server - The Computer Archive on 2019-11-16, by The Computer Archive. Uses a Teltone TSL-4 Telephone Line Simulator with 4 ports to allow a phone, fax machine, Compaq Presario with Windows 95, and a Windows XP system to call eachother.