IBM 3745 Console Setup Manual page 195

host processor. (1) A processor that controls all
or part of a user application network. (2) In a
network, the processing unit in which the access
method for the network resides. (3) In an SNA
network, the processing unit that contains a
system services control point (SSCP). (4) A
processing unit that executes the access method
for attached communication controllers. Also
called host.
IBM service representative. An individual in
IBM who carries'out maintenance services for IBM
products or systems. Also called the Customer
engineer.
integrated services digital network (ISDN). A
digital end-to-end telecommunication network that
supports multiple services including, but not
limited to, voice and data.
International Telecommunication Union (ITU).
The specialized telecommunication agency of the
United Nations, established to provide
standardized communication procedures and
practices, including frequency allocation and radio
regulations worldwide. (Formerly CCITT).
Internet Protocol (IP). In TCP/IP, a protocol that
routes data from its source to its destination in an
Internet environment.
line interface coupler (LlC). A circuit that
attaches up to four transmission cables to the
controller (from DTEs, DCEs, or
telecommunication lines).
local area network (LAN). A computer network
located on a userls premises within a limited
;geographical area. Communication within a LAN
is not subject to external regulation; however,
communication across the LAN boundary may be
subject to some form of regulation.
logical unit (LU). In SNA, a port through which
an end user accesses the SNA network in order to
communicate with another end user and through
which the end user accesses the functions
provided by system services control pOints
(SSCPs). An LU can support at least two
sessions, one with an SSCP and one with another
LU, and may be capable of supporting many
sessions with other logical units.
X-4
All 3745 Models & the 3746-900: CSG
maintenance and operator subsystem -
extended (MOSS-E). The licensed internal code
loaded on the service processor hard disk to
provide maintenance and operator facilities to the
user and IBM service representative.
medium access control (MAC). For LAN, the
method of determining which device has access to
the transmission medium at any time.
microcode. A program that is loaded in a
processor (for example, the MOSS-E processor)
to replace a hardware function. The microcode is
not accessible to the customer.
multistation access unit (MAU). In the IBM
token-ring network,' a wiring concentrator that
connect up to eight lobes to a ring,
NetView Performance Monitor (NPM). An IBM
licensed program that collects, monitors, analyses,
and displays data relevant to the performance of a
VT AM telecommunication network. It runs as an
on-line VTAM application program.
network. See user application network.
Network Control Program (NCP). An IBM
licensed program that provides communication
controllers supports for single-domain, multiple
domain, and interconnected network capability.
network node processor (NNP). The processor
that is attached to the 3746-950 via a token-ring
LAN, running the APPN Network Node functions.
on-line information and help. Information
stored in a computer system than can be
displayed, used, and sometimes modified in an
interactive manner without any need to obtain a
hard copy.
physical unit (PU). In SNA, the component that
manages and monitors the resources, such as
attached links and adjacent link stations,
associated with a node, as requested by an SSCP
via an SSCP-PU session. An SSCP activates a
session with the physical unit in order to indirectly
manage, through the PU, resources of the node
such as attached links. This term applies to type
2.0, type 4, and type 5 nodes only.
received line signal detector (RLSD). A signal
defined in the EIA-232 standard that indicates to
the data terminal equipment (DTE) that it is
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