NS3000/iX NMMGR Screens Reference Manual - Edition 8 (36922-90038)
320 Glossary
Glossary
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 orderto operate. Thisfile
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 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 3000.
CUG See closed user group.
D
data Basic elements of
information that can be processed
or produced by a computer.
Datacommunications and
Terminal Controller See DTC.
data overrun Transmitted data
that is sent faster than the
receiving equipment can receive
it. The resultant overflow data is
lost. See also flow control.
Datapac The national public
PSN of Canada.
Datex-P The national public
PSN of West Germany.
D bit Delivery confirmation bit.
Used in the X.25 protocol, the
setting of the D bit in DATA
packets indicates whether
delivery acknowledgment of the
packet is required from the local
DCE or from the remote DTE. It