An Attachment Unit Interface (AUI) is a 15 pin connection that provides a path between a node's Ethernet interface and the Medium Attachment Unit (MAU), sometimes known as a transceiver. It is the part of the IEEE Ethernet standard located between the Media Access Control (MAC), and the MAU. An AUI cable may be up to 50 meters long, although frequently the cable is omitted altogether and the MAU and MAC are directly attached to one another.
AUI connectors became rare beginning in the early 1990s when computers and hubs began to incorporate the MAU, particularly as the 10BASE-T standard became more common and use of 10BASE-5 (thicknet) and 10BASE-2 (thinnet) declined. The electrical AUI connection was still present inside the equipment. By the mid-1990s AUI had all but disappeared as fast Ethernet became more common (fast Ethernet has an equivalent known as Media Independent Interface, MII). Gigabit Ethernet and 10 gigabit Ethernet have respectively the GBIC and XAUI standards which are equivalent to AUI.
A modified form using a smaller connector called the AAUI was introduced on Apple Macintosh computers in 1991, and its use discontinued in 1998.
Read more about Attachment Unit Interface: Connector and Signals
Famous quotes containing the words attachment and/or unit:
“The English, besides being “good haters,” are dogged and downright, and have no salvos for their self-love. Their vanity does not heal the wounds made in their pride. The French, on the contrary, are soon reconciled to fate, and so enamoured of their own idea, that nothing can put them out of conceit with it. Whatever their attachment to their country, to liberty or glory, they are not so affected by the loss of these as to make any desperate effort or sacrifice to recover them.”
—William Hazlitt (1778–1830)
“During the Suffragette revolt of 1913 I ... [urged] that what was needed was not the vote, but a constitutional amendment enacting that all representative bodies shall consist of women and men in equal numbers, whether elected or nominated or coopted or registered or picked up in the street like a coroner’s jury. In the case of elected bodies the only way of effecting this is by the Coupled Vote. The representative unit must not be a man or a woman but a man and a woman.”
—George Bernard Shaw (1856–1950)