Glossary
U24802-J-Z146-2-7600 RM400 C Models 185
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Glossary
American National Standards Institute (ANSI)
An organization dedicated to developing and publishing standards to make
products more compatible (which means they are interchangeable or can be
combined with one another).
asynchronous data transmission
A form of data transmission in which synchronization between sender and
receiver is established for a series of bits. Start and stop bits form the
beginning and end of each character. The time interval between the transferred
characters can vary. Also known as start/stop transmission.
asynchronous transfer mode (ATM)
ATM is a transmission procedure for high-speed data transfer, both in LANs
and in WAN s. The data is transferred in cells with a fixed length of 53 bytes. This
procedure can be used on various different cables (fiber optic cable, copper
cable) and at a variety of speeds (e.g. 155 Mbit/s or 25.6 Mbit/s).
battery backup unit (BBU)
The battery backup unit supplies power to a system cabinet or peripherals
cabinet for a short period during a power failure. This allows power failures to
be bridged and the computer system to be switched off properly.
Bitronics interface
The Bitronics interface carries bidirectional communications between the
system and a printer. It is based on the Centronics interface standard, but it
transfers data faster. Printers which have a standard Centronics interface can
also be operated via the Bitronics interface.
booting
The term “booting” refers to the process of switching on or starting up a
computer and loading the operating system.
bus
The term “bus” is used in computing, by analogy with an electrical bus-bar, to
refer to a system of parallel hardware lines and corresponding connection
points which is used to transfer signals, data and power. An example is the set
of lines carrying control signals in a CPU or a microprocessor. Any device or
system which is connected to the bus can receive any transmitted signal or
character which is addressed to it.
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