SNA NRJE User/Programmer Reference Manual (30292-90006)

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Logical device: See ldev.
Logical printer: A logical
printer receives line printer
images from a host system.
Logical punch: A logical punch
receives card punch images from
a host system.
Logical reader: A logical reader
transmits card punch images to a
host system. (See Also Virtual
reader)
Logical unit: See LU.
Logical writer: A logical writer
is a logical printer or a logical
punch.
LU: An SNA logical unit. An LU
is the SNA entity through which
application data is transmitted
within an SNA network. An LU
provides access to an SNA
network for an end user. It
formats message units, displays
information, and handles error
recovery. Multiple LUs can reside
in an SNA node.
LU class: A set of LUs on an
HP 3000. NRJE/V will identify
individual LUs only if they have
separate class names.
M
Mainframe: A mainframe is a
computer that generally has a
large amount of memory and
operates at a high speed.
N
NAU: Network addressable unit.
The NAU represents the source
and destination of data in a
network. A communications
session must exist before data can
be transferred. Three types of
NAUs exist: SSCPs, PUs, and
LUs. Sessions are established by
the SSCP,
NCP: Network control program.
This program supports SNA
communications on the IBM 3705
communications controller.
NM: Node management. This is
an MPE user capability required
for NRJE manager tasks.
NSPE: Network services
procedure error. An SNA request
from the SSCP to the LU
indicating an error during session
startup or shutdown. On receipt
of this message, NRJE logs the
content and terminates the LU
session.
O
OP: MPE system supervisor
capability.
Operating system: An
operating system is a master
control program for a computer.
Outfence: The priority value at
which,or below which,jobs or line
printer output will be deferred.
Also, the MPE console command
which sets the outfence.