5.1.7 GVC FM-144Vbis+/1 (Rockwell-based)

Basically, the modem is similar to the SupraFax modem.

Change speed in mgetty.config and sendfax.config to 19200 and set modem-handshake to AT&K4.

Further, if your model toggles DCD betwen fax pages (sendfax fails mysteriously between pages), ignore-carrier true in sendfax.config.

After that, it should work.

Note: If your modem doesn’t properly distinguish incoming fax from data calls (i.e., a 2400 bps caller is repeatedly “identified” as fax caller), upgrade your firmware. I’ve been told (thanks to John Watson, watson%carssdf@rutgers.edu) that a new firmware release, v1.69 exists that will fix those problems.