SNAX/XF LU Network Services Manual

Glossary
Glossary–4 097841 Tandem Computers Incorporated
protocol supports a single character stream; ITI translates the message and encloses it
in the 3270 envelope.
Katakana. The double-byte Japanese character set used with Japanese-language SNA
terminals and printers.
leased line. A connection between systems or devices that does not have to be made by
dialing. Synonymous with nonswitched line.
logical unit (LU). An entity representing a logical port that provides access to the services
of an SNA network, typically for communications between end users such as
terminals, printers, or application programs. Each LU supports a session between two
end users (LU-LU session). SNA categorizes LUs according to the type of end-user
services that the LU provides.
low PIN. A process identification number that ranges from 0 through 254. See also high
PIN.
LU. Logical unit.
LUNS. LU Network Services.
National Character Support (NCS). An implementation within National Language Support
where one character set may be translated to another. These sets may be machine-
dependent (such as ASCII to EBCDIC) or language-dependent (such as Katakana to
Swedish).
National Language Support (NLS). An architecture that defines how a system operates
independently of language constraints, as well as how to create a particular language
version for that system. The architecture may also define how multiple language
versions of the system may run simultaneously on the same node or network, with the
application end-user choosing the language.
NAU. Network addressable unit.
NC. Network control.
NCS. National character support.
network. A group of interconnected computer systems and devices, and the hardware
and software used to connect them.
network address. In SNA, an address, consisting of subarea and element fields, that
identifies a network addressable unit. Subarea nodes use network addresses;
peripheral nodes use local addresses. The boundary function in the subarea node to
which a peripheral node is attached transforms local addresses to network addresses
and vice versa.
NLS. National language support.
node. In SNA, an end point of a link or junction common to two or more links in a
network. There are peripheral and subarea nodes. Nodes include host processors,
communication controllers, cluster controllers, or terminals, and vary in routing and
other functional capabilities. Each SNA node must contain at least one NAU. There
are five Node Types.