Server :: ISDN Fax Receiving / Save Fax As A Picture To File And Somehow Retain Telephone Number?

I have an old Brooktrout ISDN fax card on BRI used mostly for receiving faxes. It works with windows fax server software which sends faxes to different e-mail boxes according to telephone number on which fax was send.

Since card is getting rather old and I don particulary like server software I wonder has anyone got any practice with linux fax servers. What I need is ISDN fax card and software which is able to save fax as a picture to file and somehow retain telephone number (filename or directory name). Sending picture by email is than trivial task.