Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90057)

Glossary
maintenance mode
Glossary
256256
M
maintenance mode An NMMGR character mode
interface used to manage both network directory and
configuration files. It can be used interactively, from
within the screen mode interface, or as a set of
commands entered via a batch job.
map, network A drawing that shows the topology
of the network. For networks managed by the
OpenView DTC Manager a network map must be
created through use of the OVDraw capability
provided with the management software. A network
map is also a hardcopy drawing used when planning
a network. It shows network topology, node and
network names, addresses, network boundaries (for
an internetwork map), and link types.
mapping A set of characteristics that describe a
route taken by messages to reach a destination node.
This set of characteristics is configured with
NMMGR at every node on a point-to-point network.
One mapping is configured at each node for every
other node on the network to which messages will be
sent.
MAU Medium Attachment Unit. A device attached
to a ThickLAN coaxial cable that provides the
physical and electrical connection from the AUI
cable to the coaxial cable.
M bit More data bit. Setting this bit in a DATA
packet indicates that at least one more DATA packet
is required to complete a message of contiguous
data.
MDP Modem Distribution Panel. A distribution
panel that serves as the electrical and physical
interface between a DTC 72MX mux board
(asynchronous processor board) and up to eight
asynchronous devices for direct or modem
connections. Also called ADP.
MIB Management Information Base. A database of
information about a network node used by SNMP.
MIT Master Installation Tape. A magnetic tape
containing the Fundamental Operating System for
an HP 3000 Series 900 computer.
modem modulator/demodulator. A device that
modulates and demodulates signals. Primarily used
for modulating digital signals onto carriers for
transmission and for performing the inverse
function at the receiving end. Modems are essential
for transmitting and receiving digital signals over
telephone lines.
modulo Value used as the counting cycle for
determining the send sequence number (N(S)) of
frames sent across an X.25 network.
modulation The process in which certain
characteristics of a carrier signal are altered in
accordance with the changes of an
information-bearing signal.
MPE/iX MultiProgramming Executive iX The
operating system of the HP3000 Series900
computers. The NS 3000/iX network services operate
in conjunction with the MPE/iX operating system.
multiplexer MUX. A device that allows multiple
communication links to use a single channel.
N
nailed device A device with a permanently
assigned ldev. The assignment is established
through the system configuration of the MPE/iX host
system. Nailed devices can be accessed
programmatically through their ldev number. Nailed
devices can also be assigned to more than one host.
native mode The run-time environment of MPE/iX.
In Native Mode, source code has been compiled into
the native instruction set of the HP3000 Series900
computer.
neighbor gateway A gateway that is in the same
network as a given node.
NetIPC Network Interprocess Communication.
Software that enables programs to access network
transport protocols.
network A group of computers connected so that
they can exchange information and share resources.
network address This can be either 1) the network
portion of an IP address as opposed to the node
portion, or 2) when referring to X.25 networks, it is a
node’s X.25 address.
network boundary The logical division between
networks in an internetwork.