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
Internet fax to scan documents and send them as a fax. Some providers also offer the option to get a dedicated fax number and receive fax on this number. The Internet has enabled the development of several other methods of sending and receiving a fax. The more common method is an extension of computer-based faxing, and involves using a fax server/gateway to the Internet to convert documents between faxes and emails. The process is often referred to as "fax to mail" or "mail to fax". This technology offers the advantage of dispensing with the machine as well as the additional telephone line,