I have been testing a newly implemented Asterisk server with Free Fax For Asterisk. I have been able to successfully send several tiff files as faxes. But others fail. One difference I noticed was in the resolution of the tiff files. Those with 204x196 worked, other resolutions didn't. Does anyone know if there are any restrictions on the resolution of tiff files when sending a fax...and if so, what are they?