X25AM Configuration and Management Manual

Glossary
X25AM Configuration and Management Manual—523424-004
Glossary-6
MIB
MIB. See management information base (MIB).
modem. Modulator Demodulator. Hardware that converts digital data to an analog signal for
transmission over a telephone channel, or that converts an analog signal into digital
data.
modem eliminator. Device that allows data communications equipment to be connected
without modems and telephone lines.
modulo8. A repeating packet-numbering sequence. Packets are numbered 0 through 7.
modulo128. A repeating packet-numbering sequence. Packets are numbered 0 through
127.
NAM protocol. Network Access Method protocol. Used by the X25AM process when other
NonStop communications subsystems also using the NAM protocol want to use an
X.25 network or protocol for connection.
network. Group of nodes connected by communications lines.
node. Point of connection in a network. Usually consists of a computer or other peripheral
device that provides a switching or terminating point in the network.
NonStop operating system. The operating system for NonStop servers.
nonswitched line. Line configuration that provides a permanent path between two stations.
This path can be a privately owned cable or a dedicated path leased from a common
carrier. It is generally a leased line.
octal. Base-8 numbering system.
octet. 8 bits (1 byte).
operating system image. Specifies the configuration for the operating system and is
loaded onto a computer system to make it operational.
OSI. Open Systems Interconnection. Set of standards used for the interconnection of
heterogeneous computer systems that provides universal connectivity.
OSM. Stands for HP Open System Management (OSM) Interface. OSM replaces TSM as
the system management tool of choice for NonStop S-series servers. OSM provides
the same functionality as TSM while overcoming limitations of TSM. OSM is required
for support of new functionality in G06.21 and later, and is the only supported
management tool for Integrity NonStop NS-series servers.
packet. Group of bits arranged in a specific format within a frame, transmitted as a whole on
a packet-switching network. The message contains both control information (for
routing) and data.