IBM 8265 Nways ATM Switch, User Manual

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and chief characteristics of its functional units. More
specifically, the term may refer to a hardware
configuration or a software configuration. (I) (A)
(2) The devices and programs that make up a system,
subsystem, or network.
connect. In a LAN, to physically join a cable from a
station to an access unit or network connection point.
Contrast with
attach.
connection. (1) In data communication, an
association established between functional units for
conveying information. (I) (A) (2) In Open Systems
Interconnection architecture, an association established
by a given layer between two or more entities of the
next higher layer for the purpose of data transfer. (T)
(3) In SNA, the network path that links two logical units
(LUs) in different nodes to enable them to establish
communications. (4) The path between two protocol
functions, usually located in different machines, that
provides reliable data delivery service. (5) A logical
association between a call participant (party) and a
switch. A party's connection represents that party's
participation in a telephone call.
crankback. A mechanism for partially releasing a
connection setup in progress which has encountered a
failure. This mechanism allows PNNI to perform
alternate routing.
customer-replaceable unit (CRU). An assembly or
part that a customer can replace in its entirety when
any of its components fail. Contrast with
field
replaceable unit (FRU).
D
data communication. (1) Transfer of information
between functional units by means of data transmission
according to a protocol. (T) (2) The transmission,
reception, and validation of data. (A)
data transfer rate. The average number of bits,
characters, or blocks per unit of time passing between
equipment in a data-transmission system. (I) The rate is
expressed in bits, characters, or blocks per second,
minute, or hour.
data transmission. The conveying of data from one
place for reception elsewhere by telecommunication
means. (I)
default. Pertaining to an attribute, condition, value, or
option that is assumed when none is explicitly
specified. (I)
destination. Any point or location, such as a node,
station, or particular terminal, to which information is to
be sent.
device. (1) A mechanical, electrical, or electronic
contrivance with a specific purpose. (2) An input/output
unit such as a terminal, display, or printer.
diagnostics. Modules or tests used by computer users
and service personnel to diagnose hardware problems.
DMM. Distributed Management Module.
dump. (1) To record, at a particular instant, the
contents of all or part of one storage device in another
storage device. Dumping is usually for the purpose of
debugging. (T)
(2) To copy the contents of all or part
of virtual storage for the purpose of collecting error
information.
E
EIA. Electronic Industries Association.
EEPROM. Electrically Erasable Programmable
Read-Only Memory.
electrically erasable programmable read-only
memory (EEPROM). A PROM that can be erased by
a special process and reused. (T)
Electronic Industries Association (EIA). An
organization of electronics manufacturers that advances
the technological growth of the industry, represents the
views of its members, and develops industry standards.
Ethernet. A local area network that allows multiple
stations to access the transmission medium at will
without prior coordination, avoids contention by using
carrier sense and deference, and resolves contention by
using collision detection and delayed retransmission.
external reachable address. An address that can be
reached through a PNNI routing domain, but which is
not located in that PNNI routing domain.
F
FCC. Federal Communications Commission (USA).
field. On a data medium or a storage medium, a
specified area used for a particular category of data; for
example, a group of character positions used to enter or
display wage rates on a panel. (T)
file. A named set of records stored or processed as a
unit. (T)
Glossary
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