I do not use vsi-fax so I do not know the details. From the 10,000 foot view, within SX.e you can setup the vsi-fax as a printer device. Instead of printing a report to a printer you can send the output to the vsi-fax device which will fax it. The fax information comes from customer or vendor or system settings. Check out the on-line help within SX.e.