IBM SY27-0345-06, Service And Maintenance Manual

Page: 137 / 148

dump. (1) Data that has been dumped. (T) (2) To
copy the contents of all or part of virtual storage for the
purpose of collecting error information.
E
EC. European community.
EIA. Electronic Industries Association.
Electronic Industries Association (EIA). An organ-
ization of electronics manufacturers that advances the
technological growth of the industry, represents the
views of its members, and develops industry standards.
EIA 232. In data communications, a specification of
the Electronic Industries Association (EIA) that defines
the interface between data terminal equipment (DTE)
and data circuit-terminating equipment (DCE), using
serial binary data interchange.
electrostatic discharge (ESD). An undesirable dis-
charge of static electricity that can damage equipment
and degrade electrical circuitry.
EMC. Electromagnetic compatibility.
ESD. Electrostatic discharge.
Ethernet. A 10-Mbps baseband local area network
that allows multiple stations to access the transmission
medium at will without prior coordination, avoids con-
tention by using carrier sense and deference, and
resolves contention by using collision detection and
transmission. Ethernet uses carrier sense multiple
access with collision detection (CSMA/CD).
F
F. Fahrenheit.
faceplate. A wall-mounted or surface-mounted plate
for connecting data and voice connectors to a cabling
system.
FCC. Federal Communication Commission.
feature code. A code used by IBM to process hard-
ware and software orders.
field replaceable unit (FRU). An assembly that is
replaced in its entirety when any one of its components
fails. In some cases, a field replaceable unit may
contain other field replaceable units.
FRU. Field replaceable unit.
G
gateway. (1) A functional unit that interconnects two
computer networks with different network architectures.
A gateway connects networks or systems of different
architectures. A bridge interconnects networks or
systems with the same or similar architectures. (T)
(2) In the IBM Token-Ring Network, a device and its
associated software that connect a local area network
to another local area network or a host that uses dif-
ferent logical link protocols.
H
host. In the Internet suite of protocols, an end system.
The end system can be any workstation; it does not
have to be a mainframe.
I
IBM Disk Operating System (DOS). A disk operating
system based on MS-DOS** that operates with all
IBM-compatible personal computers.
IBM Token-Ring Network. A baseband local area
network with a ring topology that passes tokens from
Token-Ring adapter to Token-Ring adapter.
IEEE. Institute of Electrical and Electronics Engineers.
integrated services digital network (ISDN). A digital
end-to-end telecommunication network that supports
multiple services including, but not limited to, voice and
data.
Note: ISDNs are used in public and private network
architectures.
interface. (1) A shared boundary between two func-
tional units, defined by functional characteristics, signal
characteristics, or other characteristics, as appropriate.
The concept includes the specification of the connection
of two devices having different functions. (T) (2) Hard-
ware, software, or both, that links systems, programs, or
devices.
International Organization for Standardization
(ISO). An organization of national standards bodies
from various countries established to promote develop-
ment of standards to facilitate international exchange of
goods and services, and develop cooperation in intellec-
tual, scientific, technological, and economic activity.
Internet Packet Exchange (IPX). The routing protocol
used to connect Novell’s servers or any workstation or
router that implements IPX with other workstations.
Although similar to TCP/IP, it uses different packet
formats and terminology. See also
TCP/IP and Xerox
Network Services (XNS).
Glossary
X-3