Configuring and Managing Host-Based X.25 Links - Edition 6 (36939-90057)

Glossary
NS 3000/iX Network Services
Glossary
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the DTC/X.25 iX Network Link, the NS
Point-to-Point 3000/iX Link, and the Token Ring
3000/iX Network Link.
NS 3000/iX Network Services Software
applications that can be used to access data, initiate
processes, and exchange information among nodes in
a network. The services are RPM, VT, RFA, RDBA,
and NFT.
NS Point-to-Point 3000/iX Link Hardware and
software necessary to create networks in which data
is transmitted from node to node over a defined
route until it reaches its destination. This technique
is referred to as store and forward. Systems in a
point-to-point network are connected by means of
leased or dial-up telephone lines. HP 3000 systems
attach to the point-to-point network via HP 3000
Programmable Serial Interface (PSI) cards that fit
into the back of each system’s SPU.
NSDIR.NET.SYS Name of the active network
directory file. See also network directory.
octet An eight-bit byte operated upon as an entity.
OpenView Admin An OpenView Windows
program that enables you to configure how your
OpenView Windows applications will function. For
example, it enables you to set a default map for the
OpenView DTC Manager.
OpenView Draw An OpenView Windows program
that enables you to draw the network map, and to
label the components on it.
OpenView DTC Manager OpenView Windows
application that enables you to configure, control,
monitor, and troubleshoot the operation of the
Datacommunications and Terminal Subsystems on
the LAN.
OpenView Run An OpenView Windows program
that covers most of the control features used by the
DTC Manager, including monitoring and diagnostic
functions.
OpenView Windows The set of three programs:
OV Admin, OV Draw and O VRun, running on the
OpenView workstation under MS Windows, that
acts as the platform for all OpenView applications,
such as DTC Manager.
OpenView Windows Workstation The personal
computer that provides software downloads to
enable operation of the Datacommunications and
Terminal Controller (DTC). The configuration
software that runs on this workstation is called the
OpenView DTC Manager software.
OSI model Open Systems Interconnection model. A
model of network architecture devised by the
International Standards Organization (ISO). The
OSI model defines seven layers of a network
architecture, with each layer performing specified
functions.
packet A block of data whose maximum length is
fixed. The unit of information exchanged by X.25 at
level 3. There are DATA packets and various control
packets. A packet type is identified by the encoding
of its header.
Packet Exchange Protocol PXP. A transport layer
protocol used in NS 3000/iX links to initially
establish communication between nodes when
NetIPC socket registry is used.
packet-switched network name The name of a
data communication network adhering to the CCITT
X.25 recommendation. This can be a PDN or a
private network, such as the HP PPN.
PAD (Packet Assembler/Disassembler) A device
that converts asynchronous character streams into
packets that can be transmitted over a packet
switching network (PSN).
PAD name A name of up to eight characters that is
associated with a configured PAD device. The PAD
name is known to both the DTC and the host
systems that the device can access.
PAD profile Terminal or printer profile that
specifies the configuration characteristics for
PAD-connected devices.
PAD support A software module which can be
downloaded to an X.25 board in a DTC. The software
is used to manage connections with remote PAD
devices.
partner gateway half When gateway halves are
used, two gateway halves are required in order to
provide communication between two networks. Each
is the partner of the other.