-> as it has been on OS/2, use SIO with vmodem providing the virtual
-> modem port for the software to talk to... i still use SIO 1.60D

I tried the SIO vmodem and it didn't work on warp4, an incompatible
dll problem I recall ... or did you mean you're only using SIO with
serial ports, and not vmodem?

I have an inbound telnet solution for PCBoard. It's a reverse telnet
proxy, written in PERL, runs on linux. Works for me cause I use a linux
box for my router/firewall.

The PCboard nodes connect to the linux proxy with serial ports and null
modem cables, if you have a multiport serial card on the linux box, or
via ethernet and a telnet fossil I wrote. The fossil needs Novell TCP/IP
from Client32, so your node requires that to run the fossil.  Can be
either DOS or Windows 3.1.  I have a Windows 3.1 test box set up with 2
nodes working, I think it could do 4.

It's all free, but a lot of work to get working. People enjoy talking
about the good old days and PCBoard, but few are willing to invest the
time and effort to make it happen.

--- PCBoard (R) v15.4/M 250 Beta