NS3000/iX NMMGR Screens Reference Manual - Edition 8 (36922-90038)

Glossary 319
Glossary
the sending node. The address of
the sending node is the calling
address.
carrier A continuous wave that
is modulated by an
information-bearing signal.
catenet See internetwork.
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. The emphasis
is on “recommendations”; no
carrier is required to adhere to a
CCITT recommendation,
although most do so in their own
interests.
CIB The channel input/output
bus in the backplane of an
HP 3000.
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 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, 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