The first thing to do know to begin checking if the modem worksis to give it a dial command to any phone number) other than the one the modem is connected to) near you or arranged with somebody, to verify
Well, ok, I see you are worried, as you work on the driver and for free at that. I did try to connect - to a fax - and I dont see hanging as the thing a driver should do even if it does not support connecting to faxes.
Thanks for the driver such as it is.