So recently I've been trying to create my own dial up server with a PBX and a couple modems.
The modems communicate fine, they buzz and all, but whenever I try setting up a dial up server and connecting to it I get error 720 or 733.

On windows 7 I go to Network Adapters > Alt+F > New Incoming Connection, and I set up the dial up connection how I want it, and associate users
On the other computer, I set it up to dial !,10 which is the extension for the PBX to connect to the server.
It connects, logs in, and then gives either error 720 and 733.

https://www.youtube.com/watch?v=lTHYDzqjTvE&d … sable_polymer=1
This is sort-of what I was trying to replicate