Black fax to harass large institutions or government departments, to retaliate against the senders of junk faxes, or merely as simple pranks. The basic principle of a black fax can be extended to form a "black fax attack." In this case, one or more sheets are fed halfway through the sender's fax machine and taped end to end, forming an endless loop that cycles through the machine. Not only can solid black be used, but also images which will repeat endlessly on the receiver's machine until its toner runs out. The introduction of computer-based facsimile systems (combined with integrated document imaging solutions)
Windows Fax and Scan model, improved composition features, the ability to save faxes in composition as drafts, and a preview pane. It is also possible to right click on a file and send it as a fax. To send and receive faxes users can create either a local fax modem account to use a locally attached fax-capable modem or a shared fax server account to use a network fax server.The Windows Fax and Scan software is not an internet fax application. Therefore, it must be used with an analog phone line. The Scan View of WFS has a user interface to manage scanned documents.