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AAUI connectors were also present on some Processor Direct Slot Ethernet adapter cards used in Macintosh LC and Performa machines.
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AAUI and connectors
Instead of a single BNC connector that was inserted into a T-connector placed inline in the cable, the AAUI transceiver had two BNC connectors, one on each side to which the cables were attached.
AAUI and were
FriendlyNet equipment was quite expensive and even third party AAUI transceivers were rather expensive.
An adapter containing a power supply to provide the required 12 volts was available from Apple to permit connection of standard AUI transceivers to an AAUI port-this facilitated direct connection to 10BASE-F ( fibre optic ) and 10BASE5 ( ThickNet ) Ethernet networks, for which AAUI transceivers were not available.
AAUI and also
Many third parties also created AAUI transceivers.
AAUI and on
This FriendlyNet system was based on the industry-standard Attachment Unit Interface, but deliberately chose a non-standard connector that was smaller and easier to use, which they called " Apple AUI ", or AAUI.
As 10-BASE-T became the de-facto cabling system for Ethernet, second-generation Power Macintosh machines added a 10-BASE-T port in addition to the AAUI, and eventually dropped AAUI on Macs with the New World ROM.
By the time AAUI was nearing the end of its life, an AAUI transceiver could cost as much or more than the cost of a low-cost Ethernet card on the PC.
3rd party AAUI devices often omitted this sheath, requiring the user to directly squeeze small tabs on the sides of the plug housing to detach the hooks.
A modified form using a smaller connector called the AAUI was introduced on Apple Macintosh computers in 1991, and its use discontinued in 1998.
AAUI and some
In appearance it is a small flat trapezic connector, the same connector as the AAUI connector used by Apple Computer for some time to connect to ethernet.
AAUI and Ethernet
Apple Attachment Unit Interface ( AAUI ) is a mechanical re-design by Apple of the standard Attachment Unit Interface ( AUI ) used to connect Ethernet transceivers to computer equipment.
AAUI was part of a system of Ethernet peripherals that tried to make connecting to Ethernet much easier.
AAUI and used
Later models included both an AAUI and modular connector port for directly connecting 10BASE-T ; either could be used, but not both at the same time.
AAUI and Macintosh
Macintosh Quadra, Centris, PowerBook 500, Duo Dock II ( for PowerBook Duo ) and early Power Macintoshes had an AAUI port, which requires an external transceiver.
AAUI and machines
AAUI had disappeared by the late 1990s, when all new Apple machines included only 10BASE-T.
AAUI and .
AUI was popular in the era before the dominance of 10BASE-T networking that started in the early 1990s ; AAUI was an attempt to make the connector much smaller and more user friendly.
Additionally, AAUI held no advantage for any system other than 10BASE2 and thus as 10BASE-T became ubiquitous it became impossible to justify the cost of an external transceiver at all.
AAUI replaced these with a small 14-position, 0. 050-inch-spaced ribbon contact connector.
AAUI signals have the same description, function, and electrical requirements as the Attachment Unit Interface ( AUI ) signals of the same name, as detailed in IEEE 802. 3-1990 CSMA / CD Standard, section 7, with the exception that most hosts provide only 5 volt power rather than the 12 volts required for most AUI transceivers.
connectors and were
Backplanes have grown in complexity from the simple Industry Standard Architecture ( ISA ) ( used in the original IBM PC ) or S-100 style where all the connectors were connected to a common bus.
The Systems Modules were designed with all of the connections at the back of the module using 22-pin Amphenol connectors, and were attached to each other by inserting them into a custom 19-inch rack.
These op-amps were effectively small circuit boards with packages such as edge connectors.
The Duos were a series of very thin and lightweight laptops with a minimum of features, which could be inserted into a docking station to provide the system with extra video memory, storage space, connectors, and could be connected to a monitor.
Common problems were non-standard pin assignment of circuits on connectors, and incorrect or missing control signals.
Many terminals were manufactured with female terminals but were sold with a cable with male connectors at each end ; the terminal with its cable satisfied the recommendations in the standard.
During the war many electrical connectors and switches were silver plated.
In many households, telephones were hard-wired to wall terminals before connectors like RJ11 and BS 6312 became standardised.
LocalTalk connectors were first released in January 1985 to connect the Laserwriter printer initially with the Macintosh family of computers as an integral part of the newly announced Macintosh Office.
Unfortunately, when mixing and matching Apple and non-Apple 10BASE2 devices, there were many seemingly natural configurations of cables and connectors which would cause the network to become unreliable or unusable in the area, reducing the value of the complex and proprietary Apple 10BASE2 wiring system.
a large installed base remained and a large variety of connectors, adapters and equipment such as ADSL filters were still in production and readily available.
Original II motherboards ( those produced between 1986 to mid 1989 ) have electrical connections for the IIe power supply and keyboard present, although only about half produced have the physical plug connectors factory pre-soldered in, which were mostly reserved for the upgrade kits.
BNC connectors were commonly used on 10base2 thin Ethernet networks, both on cable interconnections and network cards.
BNC connectors were thus originally made only in 50 ohm versions, for use with any impedance of cable.
In the USSR, BNC connectors were copied as SR-50 ( СР-50 in Cyrillic ) and SR-75 ( СР-75 in Cyrillic ) connectors.
Early ones were designed with just an extra inner conductor, but later triaxial connectors also include a three-lug arrangement to rule out an accidental forced mating with a BNC connector.
The ports were left uncovered along the left side: a cover was thought to be fragile and unnecessary with the iBook's new interfaces, which lacked the exposed pins of earlier connectors.
To keep pace with the abilities of new display technologies, attempts were made since the late 1970s to preserve more of the Y ' UV signal while transferring images, such as SCART ( 1977 ) and S-Video ( 1987 ) connectors.
Many of the pins of the I / O portions of the 6530s were connected to two connectors on the edge of the board, where they could be used as a serial system for driving a Teletype Model 33 ASR and paper tape reader / punch ).
The Centronics parallel interface quickly became a de facto industry standard ; manufacturers of the time tended to use various connectors on the system side, so a variety of cables were required.
connectors and also
Because the Eurocard system provided for so many modular card sizes and because connector manufacturers have continued to create new connectors which are compatible with this system, it is a popular mechanical standard which is also used for innumerable " one-off " applications.
Most disk drives also connect to the power supply via dedicated connectors.
" Glad-hand " connectors ( also known as " palm couplings ,") are air hose connectors, each of which has a flat engaging face and retaining tabs.
10BASE2 ( also known as cheapernet, thin Ethernet, thinnet, and thinwire ) is a variant of Ethernet that uses thin coaxial cable ( RG-58A / U or similar, as opposed to the thicker RG-8 cable used in 10BASE5 networks ), terminated with BNC connectors.
They are also used when extending any sort of cable that normally has plugs on both ends ( rather than a socket on one and plug on the other ), however in this case it is usually called just an " extender ", such as with F connectors, BNC connectors, and various RJ connectors used in telephony and computer networking.
Radio frequency currents also tend to reflect from discontinuities in the cable such as connectors, and travel back down the cable toward the source.
In designing a system, engineers consider not only the loss in the cable but also the loss in the connectors.
This type of leakage can also occur at locations of poor contact between connectors at either end of the cable.
Such connectors are still available, but specialised fixed and line versions also exist.
Similar connectors using the bayonet connection principle exist, and a threaded connector is also available.
A BNC inserter / remover tool also called a BNC tool, BNC extraction tool or BNC apple corer, is used to insert or remove BNC connectors in high density or hard-to-reach locations, such as densely wired patch panels in broadcast facilities like central apparatus rooms.
Twin BNC ( also known as twinax ) connectors use the same bayonet latching shell as an ordinary BNC connector but contain two independent contact points ( one male and one female ), allowing the connection of a 78 ohm or 95 ohm shielded differential pair such as RG-108A.
Triaxial ( also known as triax ) connectors are a variant on BNC which carry both a signal and guard as well as ground conductor.
Some popular MIL spec connectors also have steel springs.
One of these connectors also doubled as the power supply connector, and included analog lines that could be attached to a cassette tape recorder.
MCA was primarily a 32-bit bus, but the system also supported a 16-bit mode designed to lower the cost of connectors and logic in Intel-based machines like the IBM PS / 2.
BNC connectors were also used for composite video connections on early home VCRs, often accompanied by either phono connector ( s ) or a 5-pin DIN connector for audio.
For instance, XLR connectors have a notch to ensure proper orientation, while Mini-DIN plugs have a plastic projection, which fits into a corresponding hole in the socket and prevent different connectors from being pushed together ( they also have a notched metal skirt to provide secondary keying ).
RCA connectors and cable are also commonly used to carry S / PDIF-formatted digital audio, with plugs colored orange to differentiate them from other typical connections.
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