For the new CREATIX modem, use the following settings in mgetty.config (thanks to Jens Hektor, firstname.lastname@example.org):
speed 38400 init-chat "" ATE1Q0V1 OK ATS0=0&D3&K3
modem-handshake AT&K3 in sendfax.config.
The modem has a voice mode, too, and it should work with
now. As the docs for vgetty are out-of-date, I don’t really know how to
get it to work, though.