Available on Macintosh Quadra computers, Apple Ethernet NB Card, and LaserWriter IIg printers?
14 pin Apple AAUI MALE connector at the card
The interface between the MAC-layer and Layer 1 is AAUI (Apple Attachment Unit Interface). This connector can be used to connect different physical interface tranceivers, like 10Base-T, 10Base-2 or 10Base-5. The electrical characteristics and functions are identical to the AUI connector defined in the IEEE 802.3. The signalling used is EIA modified RS422. With a speed of 230k bps. The signal encoding used FMO (bi-phase space). AAUI signals have the same description, function, and electrical requirements as the AUI signals of the same name, as detailed in the IEEE Standard 802.3-1990 CSMA/CD, section 7.
|1||FN Pwr||Power (+12V @ 2.1W or +5V @ 1.9W)|
|2||DI-A||Data In circuit A|
|3||DI-B||Data In circuit B|
|5||CI-A||Control In circuit A|
|6||CI-B||Control In circuit B|
|7||+5V||+5 volts (from host)|
|8||+5V||Secondary +5 volts (from host)|
|9||DO-A||Data Out circuit A|
|10||DO-B||Data Out circuit B|
|11||VCC||Secondary Voltage Common|
|14||FN Pwr||Secondary +12V @ 2.1W or +5V @ 1.9W|
|Shell||Protective Gnd||Protective Ground|