I am using flexihub to connect my US Robotic USB Modem from one of my server to my hylafax server.
hylafax does not seem to be able to lock the modem. It keeps complaining that the modem is been used by another application.
Hylafax than gets stuck with "Waiting for modem to become ready"
I am using CentOS 7 x86_64 with your latest flexihub on both hosts.