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

324 Glossary
Glossary
VAN Value-Added Network. A
datacommunicationnetworkthat
uses and pays for facilities
belonging to another carrier. The
value-added package is then sold
to a user.
VC See virtual circuit.
virtual circuit A logical
association between two
physically separate DTEs.
virtual terminal A network
service that allows a user to
establish interactive sessions on a
node.
VPLUS Software used to
generate screens such as those
displayed by NMMGR.
V-Series (V.##) CCITT A set of
CCITT recommendations related
to data communication over a
voice-grade telephone network.
VT See virtual terminal.
W
workstation configurator A
utility (TTUTIL) that allows
users to create customized
terminal and printer types by
entering data through a series of
VPLUS screens.
X
X.3 Defines the user facilities
that should be internationally
available from the packet
assembler/disassembler (PAD)
facility when this is offered by a
public data network.
X.21 Defines the physical
interface between a DTE and a
DCE of a public data network
where the access to the network
is made over synchronous digital
lines.
X.25 Defines the interface
between a DTE and a DCE for
packetmode operation on a public
data network (PDN).
X.25 address The X.25 address
provided by the network
administration if you are
connected to a public data
network (PDN).
X.25 address key An X.25
address key is a label that maps a
node’s IP address to its X.25
address and its associated X.25
parameters. You have a combined
maximum of 1024 X.25 address
keys in the SVC and PVC path
tables.
X.25 LUG address X.25 address
of a node belonging to a local user
group (LUG).
X.25 iX System Access The
software that works in
conjunction with the DTC/X.25
Network Access software to
provide access to X.25. The
software resides on an HP 3000
host and is configured through
use of NMMGR. To configure
access to an X.25 network, you
must configure two software