Attachment Unit Interface


Attachment Unit Interface

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 metres long, although frequently the cable is omitted altogether and the MAU and MAC are directly attached to one another.

An AUI connector is a DA-15 (D-subminiature). It has a sliding clip in place of the thumbscrews normally found on a D-connector to hold two connectors together. This clip permits the MAU and MAC to be directly attached to one another even when their size and shape would preclude the use of thumbscrews. This clip is however frequently found to be awkward and/or unreliable.

AUI connectors became rarer beginning in the early 1990s. This was because it became more common for computers and hubs to incorporate the MAU, particularly as the 10BASET 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 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 used on Apple Macintosh computers in the early 1990s.

The pinout of the AUI is as follows:

ee also

*Thicknet
*Apple Attachment Unit Interface
*XAUI


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Attachment Unit Interface — (AUI) ou interface de raccordement à l unité, est une interface qui assure la liaison entre l unité de raccordement au support (MAU) et la sous couche (partie supérieure de la couche physique dans le modèle OSI de l ISO) de signalisation de la… …   Wikipédia en Français

  • Attachment Unit Interface — AUI Stecker. Der männliche Stecker (links) befindet sich am Kabel und die weibliche Buchse (rechts) am Computer oder einem anderen Gerät des MAC (Hub, Repeater o. ä.) Ein Attachment Unit Interface (AUI) ist eine elektrische und mechanische… …   Deutsch Wikipedia

  • Attachment Unit Interface — …   Википедия

  • Attachment Unit Interface —    Abbreviated AUI. A 15 pin socket used by some Ethernet devices. AUI connections adapt between two different cabling types and work with a wide range of wiring schemes. Also known as a DIX (for Digital, Intel, Xerox) connector …   Dictionary of networking

  • Attachment Unit Interface connector used with thick Ethernet that may include a drop cable. —    Refers to a local console operator, for example, on a PBX. See also operator …   IT glossary of terms, acronyms and abbreviations

  • Apple Attachment Unit Interface — networking that started in the early 1990s; AAUI was an attempt to make the connector much smaller and more user friendly.AUI used a full sized 15 pin D connector (model DA 15) that used a sliding clip for mechanical connections in place of… …   Wikipedia

  • Medium Attachment Unit — ou MAU (unité de raccordement au support) est un moyen matériel utilisé pour connecter un répéteur, un terminal ou un ordinateur (station) à un réseau de transmission de données (support). Celui ci (préconisé par le standard Ethernet 10 Mbits/s d …   Wikipédia en Français

  • Medium Attachment Unit — Two Medium Attachment Units or transceivers. (The units shown are backwards compatibility oriented 10BASET MAUs, not the more typical 10BASE5 MAUs; cf. article.) A Medium Attachment Unit (MAU) is a transceiver which converts signals on an… …   Wikipedia

  • Medium Attachment Unit — Ein Paar Twisted Pair Transceiver Transceiver (engl., Kofferwort aus transmitter und receiver), ist die Bezeichnung für eine in konstruktiver Baueinheit ausgeführte Kombination aus Sender und Empfänger, ursprünglich in der (analogen) Funktechnik …   Deutsch Wikipedia

  • medium attachment unit —    Abbreviated MAU. A transceiver that attaches to the AUI (Attachment Unit Interface) port on an Ethernet adapter and provides electrical and mechanical attachments to fiber optic cable, twisted pair cable (TP), or other media types …   Dictionary of networking