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)
Internet fax frequently confused with Internet fax, though IP fax transmits data over an office intranet from a networked multi-functional device to the IP address of another.Taking advantage of an established LAN/WAN infrastructure, IP fax reduces or eliminates costly connection and transmission fees. T.38 is a commonly used and recommended transmission standard used for IP fax. Also, IP fax does not require a dedicated server or make use of the office mail server. IP Address Relay forwards to a multi-functional device for relaying to a local G3 fax machine. As modems came into wider use with personal computers, the computer was used