An update to my dial-up ISP project. I got a two node modem pool working a PCI card to add more serial ports. Instead of my Verizon line, I patched these modems into my PBX running asterisk with a Grandstream ATA with 4 internal lines. The PBX takes incoming calls from a new voip.ms number and uses a basic hunt group to connect to caller to the next free line.
Got a dialup modem? Feel free to give a call and let me know what OS you are using, how it goes. Details at http://dialup.world
@junkman Yeah I've got speeds of 33.6kbps with few issues. I haven't tested any POTS lines, it is all VoIP. I've been doing Verizon voip to voip.ms and my friend has been testing Google Voice to voip.ms and we usually get something close to that. I think all I did on the ATA was make sure to prefer G.711 and turn off any echo cancellation. It might just be luck that there isn't much lag in the connection.
I think that's really the only bit of that page I used as I am running Win Server right now, though I do want to switch things over to Linux at some point.
I'm using a Granstream HT504 myself so I imagine it isn't too big a jump for a 7XX model.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko