NS3000/iX NMMGR Screens Reference Manual - Edition 9 (36922-90040)

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physical and exclusive link is maintained
between two communicating devices for the
call duration. An 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 e3000 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,
including the 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
Datacommunications and 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
(NS 3000/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 software residing 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 passed when the
subsystem break character (normally
[CTRL]-Y) is entered during execution of a
program with subsystem break enabled.
cross-validate The process of assuring
that information contained in two locations
is consistent where it is imperative that it
be consistent. For example, an automatic
cross-validation occurs when you enter
SYSGEN to assure that information
contained in NMCONFIG.PUB.SYS agrees
with system configuration data.
CSMA/CD Carrier Sense Multiple Access
with Collision Detect, transmission access
method used by the LAN standard.
CSN See circuit-switching network.
CTB The cache transfer bus in the
backplane of an HP e3000.
CUG See closed user group.