Troubleshooting Terminal, Printer, and Serial Device Connections - Edition 5 (32022-90058)

Glossary
Q bit
Glossary
125
path name When configuring with NMMGR, you
can type a string in the COMMAND: field on a screen to
branch to another screen. Each screen has a unique
path name that corresponds to its location in the
hierarchy of configuration screens presented by
NMMGR.
PDN Public data network. A data communication
network whose services are available to any user
willing to pay for them. Most PDNs use packet
switching techniques.
point-to-point A link that connects either two
nodes in a NS Point-to-Point 3000/iX network or two
gateway halves.
port An outlet through which a device can be
connected to a computer, consisting of a physical
connection point and controlling hardware,
controlling software, and configurable port
characteristics. Ports can be thought of as data paths
through which a device communicates with the
computer.
Precision Architecture The hardware design
structure for the HP 3000 Series 900 computer
family.
printer name A character string of up to 16
characters specified in the DTC Manager
configuration (for networks using OpenView
Network Management) to define a printer by name.
Can be shared by several printers (port pool).
printer profile A set of configuration
characteristics that can be associated with one or
more printers through the NMMGR configuration.
Printer profile specifications include the printer
type, line speed, device class assignment, and other
values relevant to printers connected through a
DTC.
printer type A set of configuration cA collection of
characteristics that cause a printer connected to an
MPE/iX system to act and react in a specified
manner. You can configure a printer to use one of the
system-supplied printer types, or you can create
custom printer types using Workstation
Configurator.
privileged mode A capability assigned to accounts,
groups, or users allowing unrestricted memory
access, access to privileged CPU instructions, and
the ability to call privileged procedures.
probe protocol An HP protocol used by NS 3000/iX
IEEE 802.3 networks to obtain information about
other nodes on the network.
probe proxy server A node on an IEEE 802.3
network that possesses a network directory. A probe
proxy server can provide a node with information
about other nodes on the same or other networks of
an internetwork.
profile A method of grouping device connection
specifications and characteristics so that the set of
characteristics can be easily associated with groups
of like devices. See also printer profile, terminal
profile.
program captive device See programmatic
device.
Programmable Serial Interface PSI. A hardware
card that fits into the backplane of the HP 3000
Series 900 computer. It provides a physical layer
interface for NS Point-to-Point 3000/iX Links.
programmatic device PSI. A device operating
under control of a program running on a computer.
Programmatic devices can be used for input, output,
or both, depending on the device and how it is
opened by the controlling program.
protocol A set of rules that enables two or more
data processing entities to exchange information. In
networks, protocols are the rules that govern each
layer of network architecture. They define which
functions are to be performed and how messages are
to be exchanged.
PSN Packet-Switching Network. Any data
communication network in which data is
disassembled into packets at a source interface and
reassembled into a data stream at a destination
interface. A public PSN offers the service to any
paying customer.
PSS Packet-Switching System. The national public
PSN of the United Kingdom.
PVC Permanent Virtual Circuit. A permanent
logical association between two physically separate
DTEs that does not require call set-up or clearing
procedures.
Q bit See Packet Exchange Protocol.