Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90051)

Glossary 259
Glossary
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 HP 3000 Series 900
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 HP 3000
Series 900 computer.
neighbor gateway A gateway
that is in the same network as a
given node.