Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

306 Glossary
Glossary
all digital, circuit switching
network is often referred to as an
X.21 network.
closed user group An X.25 user
facility that allows
communication to and from a
pre-specified group of users and
no one else.
compatibility mode A
processing mode on HP 3000
Series 900 computers that allows
applications written for MPE V/E
based systems to be ported and
run without changes or
recompilation.
computer network A group of
computer systems connected in
such a way that they can
exchange information and share
resources.
configuration 1) The way in
which computer equipment is
physically interconnected and set
up to operate as a system. 2) The
layout of the computer system,
includingthe MPE table,memory,
and buffer sizes, that tells which
peripheral devices are (or can be)
connected to the computer and
how they can be accessed. 3) The
process of defining the
characteristics of a network in
software.
For MPE/iX based computers, the
operating systems are configured
through use of the SYSGEN
utility.
Next, the Distributed Terminal
Subsystem (DTS) link is
configured by using NMMGR
(running on the host) and can, in
addition, be configured using the
OpenView DTC Manager
software (running on the
OpenView Windows Workstation)
depending on the type of network
management you use.
A system that is to run network
services(NS3000/iX)is configured
through use of NMMGR.
Access to X.25 is configured in
two parts. The X.25 MPE/iX
System Access software is
configured on the host through
use of NMMGR. The DTC/X.25
Network Access softwareresiding
on the DTC is configured at the
OpenView Windows Workstation
through use of the OpenView
DTC Manager.
configuration file The
configuration file contains the
information that the network
needs in order to operate. This file
also contains information
necessary for link level and
NetIPC logging. The only file
name that the system recognizes
is NMCONFIG.PUB.SYS.
control-X echo Three
exclamation marks (!!!) output
to the terminal screen when the
cancel character (normally
[CTRL]-X) is entered.
control-Y trap A user written
procedure to which control is
passedwhenthe subsystembreak