Talk:Attachment Unit Interface

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Computing / Networking (Rated Stub-class, Low-importance)
WikiProject icon This article is within the scope of WikiProject Computing, a collaborative effort to improve the coverage of computers, computing, and information technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Stub-Class article Stub  This article has been rated as Stub-Class on the project's quality scale.
 Low  This article has been rated as Low-importance on the project's importance scale.
Taskforce icon
This article is supported by Networking task force (marked as Low-importance).

"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, sometimes known as a transceiver. It is the part of the IEEE Ethernet standard located between the MAC, and the MAU." That is not entirely true. AUI is located between PLS (physical layer signalling) and MAU. PLS is considered to be the upper part of Data-Link layer in ISO OSI model and it performs Manchester encoding in case of 10 Mbit/s Ethernet.

GBIC or GMII[edit]

I think the opening paragraph should list AUI's successor as GBMII. I'm not sure enough to change it mind you... — Preceding unsigned comment added by (talk) 02:25, 17 January 2013 (UTC)

I thought[edit]

internal tranceiver became the norm with 10base2. Can anyone confirm or deny this? Plugwash 01:45, 10 May 2006 (UTC)

Many if not most 10base2 cards have the AUI port in addition to the BNC connector Jasen betts (talk) 02:41, 16 February 2011 (UTC)

Fast Ethernet MII interface[edit]

The article states "By the mid-all but disappeared as fast ethernet, which has no direct equivalent of AUI, became more common." ... actually, Fast Ethernet does define an "MII" port that's analogous to AUI, although it was never widely used. The first generation of Cisco router FastEthernet cards shipped with MII. The port is a 50-pin high-density connector (HD50), the same as what some SCSI-2 devices use. Maximum MII cable length is much shorter than for AUI... something on the order of 1-2 meters. 16:42, 2 July 2006 (UTC)

Sliding Clip[edit]

the photo claiming to be the "DEC EtherWorks LC (DE100) ethernet controller" has screw fittings (like a game port) instead of the sliding clip. Jasen betts (talk) 20:21, 15 February 2011 (UTC)


I remember that the designers of the sliding clip apologised to the world for the inconvenience they created with this design (was it in Byte Magazine ?). But a quick search didn't find a reference. Anyone remembers/know of a reference ? Rps (talk) 18:04, 4 April 2011 (UTC)

I seem to recall something about this too, but I haven't the vaguest idea when it was I originally read this. In addition to standard retention screws and sliding clip retention mechanisms, there was a third type of retention also commonly used in the early days of 10BASE5. It was a metal bracket slightly larger than the sliding clip which slipped over the two posts of the transceiver cable plug and was then secured to the transceiver or network card with two screws. The screw posts on the transceiver or network card were located further out from the connector retention screws by 4-5mm. I still have some of the brackets and devices which could use them on hand, but I have no idea when I'll get around to photographing them. Perhaps we should include coverage of both of these retention mechanisms in D-subminiature along with some basic information and a link here? --Tothwolf (talk) 23:26, 4 April 2011 (UTC)


Apple introduced AAUI on the first Macs with built in ethernet - Quadra 700 and 900 in 1991. In 1995 with the 7200, they started using Rj-45 but kept the AAUI port. Apple didn't discontinue AAUI until 1998. These are the last Macs with AAUI And, this link isn't encyclopaedic in the least, but interesting note that someone has memories of AAUI on non-apple hardware: This is the most definitive link: — Preceding unsigned comment added by (talk) 02:02, 13 February 2012 (UTC)