Here's a list of modems that work with vgetty (mgetty+sendfax with voice extensions). This list comes from the mgetty 1.1.10 source code and isn't an all-inclusive list of all modems. If your modem uses one of the following chipsets, there's a good chance that it will work with vgetty with at most a patch to recognize your modem's identification string. Cirrus Logic chipset Dynalink V1414VC Rockwell chipset Dynalink V1414VQE Sierra chipset UMC UM92144EF chipset Creatix PhoneMaster 144VFi IS-101 interim standard for voice modems Dolphin voice modem Dr. Neuhaus Cybermod Elsa MicroLink Elsa 28.8 TQV TKR Tristar 28.8 Linux ISDN (ISDN4Linux) MultiTech 2834 US Robotics ZyXEL 2864 ZyXEL 1496