CUPS Fax Backend Howto?

[Tilman Schmidt]

Helge Blischke wrote:
> Tilman Schmidt wrote:
>
> > Johannes Meixner wrote at 04:29 Tue:
> >> Traditional PPD file syntax only allows the user to select one
> >> of a list of hardcoded choices in the PPD file.
> >>
> >> Since CUPS 1.3 it supports custom options using an extension
> >> of the CustomPageSize and ParamCustomPageSize syntax, see
> >> http://www.cups.org/documentation.php/doc-1.3/spec-ppd.html
> >
> > I'm afraid I don't quite understand that specification.
> > How would an actual PPD look like that allowed the user to
> > enter an arbitrary string through such a custom option?
>
> Perhaps it is easier to use Ghostscript's faxg3 device, which generates a
> sequential fax g3 data stream which might be usable without the conversion
> done by capifax.
> The faxg3 output can be fed through a pipe without corruption.

I'm afraid that won't work. Capifax expects TIFF, not raw Group 3 fax data, as input, and without capifax I have no way to send the data stream over the phone line (dialing, modulation/demodulation).

Also I do not understand the relation between my question how to use PPD custom options and the Ghostscript device I use?

Thanks,
Tilman