Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)
246 Glossary
Glossary
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,
includingtheMPE 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.