I think you can do it with this: (from aminet)
name: ^ path: size: date: description:
telser140.lha comm/tcp 251K 1996-03-20 Telnet(d)/rlogin(d) device/handler for TC
Telser_Keyfile.lha comm/tcp 2K 2004-01-31 Free Telser.device keyfile for everyone :
I managed to get it semi working on my AmigaOne with SystemX, but couldnt get it to run with MAXSBBS.. mainly to do with serial.device issues. It doesnt like a1serial.device so I couldnt even get it to load.
Get the keyfile as it gets rid of the demo limitations.