[GreenKeys] Hasler Teleprinter

[nico at farumdata.dk]

Hello all
I've written before about Hasler teleprinters. I've now dissected the one
I am looking at for the danish IT museum, and it shows that this one is
equipped for oddball tones.
In other words, I need something to convert RS232 (Comport signals) to
these tones.
The first part would not be a problem, as I use Gil's converters, so I can
convert from RS232 to mark/space signals. But how to use them to generate
tones? I was thinking of modems, but what would you do ?
Regards
Nico