Can't answer your question, but want to point out that the mgetty-docs package is a good source for find out about mgetty abilities (although it is not completely up to date as far as I can tell).
> Hello, > > Which fax sending/receiving package should I get, please? efax, > mgetty or ? > > Are there any advantages or disadvantages to one or the other? > > I have a generic faxmodem. If I'd be able to serve it as a PostScript > (or other) printer to a Windows box, that'd be nice (I have samba > working OK), but I can configure that easily even if the package > doesn't support it. I run hamm. > > > And, lastly, is there a better way to find out than asking on here? > The descriptions in the packages aren't particularly enlightening as > far as comparison of packages is concerned... > > Thank you >