Using the Node Management Services (NMS) Utilities (32022-90053)

Glossary 301
Glossary
CCITT Consultative Committee
for International Telephony and
Telegraphy. An international
organization of communication
carriers, especially government
telephonemonopolies,responsible
for developing telecommunication
standards by making
recommendations. No carrier is
required to adhere to a CCITT
recommendation, although most
do so in their own interest.
circuit-switching network A
type of data communications
network wherein a 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 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, 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
distributed terminal subsystem
(DTS) link is configured by using
NMMGR (running on the host)
and may, 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.If any ofthe NS linkproducts
are installed on the system,
network configuration is
accomplished through use of
NMMGR and, if PC-based X.25
connections are required, through
the OpenView DTC Manager.
configuration file The
configuration file, which you
create and update using the
NMMGR utility, contains:
1) the information that the
network needs in order to
operate.