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
Junk fax that time. However, by the late 1990s, junk faxing had once again become a widespread problem in the U.S., with the entry of a number of large-scale fax broadcasters who boasted of the capacity to send millions of fax advertisements per day. Because the legal restrictions of fax advertising are more widely known today, junk faxes are now predominately used in connection with disreputable or fly-by-night marketers. The Telephone Consumer Protection Act of 1991 (47 USC 227), or TCPA, among other things specifically outlawed junk faxing: The TCPA also requires a fax transmitter to identify the source phone number and