But some UNIX getty's DO speak Hayes AT so it's not that far-fetched an idea.. So, how do the Unix getty know that there is a hayes modem on the serial line, and not a terminal? Config files and/or command line options - some of them even know how to pass FAXES along to a fax receiving program. Not saying this should be in VMS, just that it has existed in the real world for a long time.