LU 6.2 API Application Programmer's Reference Guide (30294-90008)

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Logical Unit (LU): The SNA
entity through which application
data is transmitted within an
SNA network. Logical Units are
the ports through which end
users have access to the network
(see end user).
LU type: A Logical Unit type,
defined by SNA to perform a
particular type of communication.
LU-LU session: See session.
LU 6.2: An SNA LU type which
defines the communication that
can take place between two
application programs on separate
processors. LU 6.2 includes
specifications for programmatic
interfaces, documentinterchange,
and data distribution.
M
mapped conversation: A
programmatic conversation in
which the application is freed
from handling the GDS headers
required by LU 6.2 architecture.
mapped conversation verbs:
The programmatic
implementation of functions and
protocols in a mapped
conversation between transaction
programs. (See basic
conversation verbs.)
N
node type: A node type defined
by SNA to perform a particular
type of communication. Some
common SN
A node types are
defined as follows:
Node Type 2.0: the node type for
a peripheral node or cluster
controller. Node Type 2.0 is
supported by LU 6.2 API on MPE
V and MPE XL.
Node Type 2.1: the node type for
a peripheral node or cluster
controller capable of peer-to-peer
communication. Node Type 2.1 is
supported by LU 6.2 API on
MPE XL.
Node Type 4: the node type for a
subarea node with a
communications controller.
Node Type 5: the node type for a
host node with an SSCP (System
Services Control Point).
O
one-way conversation: A
conversation in which data is sent
from only one TP.
P
parameter mask: A bit mask
that must be passed in intrinsic
calls in Transact on MPE V. The
parameter mask tells the
intrinsic which parameters are
being passed and which are being
omitted.
peripheral: A device on the
network.