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Everything about Attachment Unit Interface

Ethernet standard interface

The Attachment Unit Interface (AUI) is a physical and logical interface defined in the IEEE 802.3 standard for 10BASE5 Ethernet and the earlier DIX standard. The physical interface consists of a 15-pin D-subminiature connector that links an Ethernet node's physical signaling to the Medium Attachment Unit (MAU), sometimes referred to as a transceiver. An AUI cable can extend up to 50 metres, though often the MAU and data terminal equipment's (DTE) medium access controller (MAC) are directly connected, bypassing the need for a cable. In Ethernet implementations where the DTE and MAU are combined, the AUI is typically omitted. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Attachment Unit InterfaceA 5-minute orientation
  2. Pick up a classic book: Unix System Administration HandbookThe most-reprinted book on the subject
  3. Go sideways: Medium Attachment UnitA closely related topic
  4. Go sideways: 10BASE2A closely related topic

📖 Definitions

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🗂️ The subject at a glance

  1. Modes
  2. Signaling and control
  3. Connector and signals
  4. Pinout table

🏆 Landmark papers (most cited)

📚 Books worth reading

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