If you want to know which attachments you can send with the XPhone Connect fax function, take a look at this article.
The following file types can be attached to a fax:
Render with Microsoft Office:
doc, docx, xls, xlsx, pptx, ppt, pps
Attention: "Print in background" must be switched OFF in Word!
Rendering with Open Office:
doc, docx, xlsx, pptx, ppt, pps, odp, ods, odt
Attention: Open Office has problems with .xls files!
Rendering PDF documents:
a) with Adobe Reader: pdf=IVMimePDF.dll
b) internally ("internal" PDF renderer of XPhone Server): pdf=IVMimePDFX.dll (default)
c) with SumatraPDF: pdf=IVMimePDFCmdl.dll
Rendering with various apps (sorted alphabetically):
bat ,bmp, clp, csv, cur, dcx, dib, emf, eps, fax, g3n, gicon, gif, htm, html, ico, icon, ini, jbig, jpeg, jpg, palm, pcd, pcx, pict, png, psd, psion3, psion5, psp, rtf, tif, tiff, txt, vcf, wbmp, wmf, xbm, xcf, xpm