>>>It would be straightforward to bring up a BBS on a Z80 like this with a standard phone modem. But that requires a "land line". I doubt that many people would want to call it -- especially since us vintage computer fans are spread so far and wide that it would be a long distance call.<<<
A direct solution is instead of POTS (old skool term for the basic phone service) compatible modem
at the end of a serial line use one of the serial connected Ethernet or Wifi modems.
Or use a Rpi[0,1,2,3,4) or similar as a bridge from modern networks to serial line
to CP/M machine.
Allison
