Fax July 1996. A major breakthrough in the development of the modern facsimile system was the result of digital technology, where the analog signal from scanners was digitized and then compressed, resulting in the ability to transmit high rates of data across standard phone lines. The first digital fax machine was the Dacom Rapidfax first sold in late 1960s, which incorporated digital data compression technology developed by Lockheed for transmission of images from satellites. Group 3 and 4 faxes are digital formats, and take advantage of digital compression methods to greatly reduce transmission times. Fax Over IP (FoIP) can transmit and
Registered fax - The data (signed document and signature) are available to both parties, sender and receiver, in a confidentially secured environment. The data is securely archived so that it can serve as legal evidence in case of dispute between the parties. Registered faxes are stored in a secured web environment. The sender and the receiver can check the authenticity of the registered fax at any time in a secured web interface, as the fax is stored and archived for a long period of time. The following table defines the items to which each party in the registered fax process has access: