In January this year (1995) a successful attempt was made to connect two standard
office telefax machines via 2 meter ham radio (at 2400 bps). So far I have not
heard of any radio amateur experimenting with Group-3 telefax. So I guess this was
a "first".

For amateurs interested in using their fax or fax modem on the VHF/UHF bands, here
is a description of the schematic diagram (Faxif.gif). It is not really
complicated. As telefax operates in half-duplex mode, the only thing the
interface has to do is separate the in and outgoing signals in interfaces for the
transceiver speaker and mike. If your transceiver has no build -in VOX, the
PTT-function (push to talk) has to be supplied by the fax interface. All together,
I built my experimental design for about $10,-.

For more info, you could download the file Presfax.ppt, a Dutch presentation
about the interface and telefax technical backgrounds. I can translate the slides
if there is a demand for it.

I'm interested in your results,
Best regards,

Reinier van der Lee, PA3DJM, Vienna
Internet: rvdlee@austria.ds.philips.com
Compuserv: 100730,3055