HP 3000 Manuals HP 3000 Manuals
GLOSSARY
ACF/NCP:
Advanced Communications Function for the Network Control Program. An IBM
program product that resides in the 37xx Communication Controller and
supports single and multiple domains.
ACF/VTAM:
Advanced Communications Function for the Virtual Telecommunication Access
Method. An IBM program on the host that provides single-domain SNA
network capability, and optionally, multiple-domain capability.
baud:
A measure of signaling speed equal to the number of signal changes or
events per second. Baud often refers to bits per second.
BIND:
A request to activate a session between two logical units. A BIND is an
SNA request sent by the host to SNA IMF. A BIND request specifies the
detailed protocol that SNA IMF accepts before initiating an LU-LU
session.
CICS:
Customer Information Control System. An IBM interactive subsystem that
acts as an interface between terminal users and a host's application
programs and databases. CICS also includes facilities for building,
using, and maintaining databases.
cluster controller:
A programmable device that supports one or more terminals or printers. A
cluster controller communicates with the host either through a local
channel attachment or through a communications controller, modems, and
phone lines. The HP 3000 emulates a cluster controller in an SNA
network.
communications controller:
A type of front-end processor, such as an IBM 3705, 3720, or 3725, that
communicates between the communications facilities and a host computer.
IBM supports both programmable and non-programmable communication
controllers. Hewlett-Packard's INP and PSI are kinds of communications
controllers.
control unit (CU):
A device that controls input and output for one or more devices such as
printers or display stations.
data stream mode:
See transparent mode.
DBCS:
Double-Byte Character Set. A character set that includes one- and
two-byte characters, used by many Asian countries.
end user:
A person at a terminal, a device, or a program running in a processor
that interacts with the network to obtain a service provided by the
network. An end user is the source and destination of application data
flowing through the network.
extra data segment (XDS):
An MPE V extra data segment, which SNA IMF/V uses to maintain data
structures related to the internal screen image, half sessions, and
message units in an LU-LU session.
FMD:
Function Management Data Services. A generic term that describes both
session presentation and session network services.
function keys:
The HP terminal keys f1 through f8, or the IBM 3278 keys PF1 through
PF24.
half session:
A component of an SNA network that provides FMD services and data flow
and transmission control for one of the sessions of an NAU.
HDLC:
High-level Data Link Control. A bit-oriented data link protocol used in
full-duplex communications. HDLC was developed by the International
Standards Organization.
host:
A central computer that provides services for other computers and
terminals attached to it.
IMF/3000:
An HP Interactive Mainframe Facility product (like SNA IMF) that runs
only on MPE V. IMF/3000 supports both BSC and SDLC protocols. It
emulates a Node Type 1 in an SNA network.
IMS:
Information Management System (IMS). An IBM program product that provides
data communication interfaces between application programs and terminals
and between application programs and databases.
INP:
Intelligent Network Processor. A hardware portion of SNA Link/V that
implements the Physical Control and Data Link Control layers of SNA.
internal screen image:
A data handling technique used by SNA IMF. When using non-transparent
mode, the internal screen image holds a character-by-character image of
an IBM 3278 screen. When using transparent mode, your application
program can obtain the untranslated data stream from the internal screen
image.
intrinsic:
A subprogram provided by Hewlett-Packard to perform common functions such
as opening files, opening communication lines, or sending and receiving
data over a communication line.
link:
The physical or logical connection between two devices in a network.
Logical Unit (LU):
A program or a set of programs within a node that provides access to an
SNA network for an end user. A Logical Unit can support two types of
sessions: LU-to-SSCP sessions and LU-LU sessions.
LU class:
Logical Unit class. A set of Logical Units on the HP 3000. For SNA IMF,
an LU class may contain multiple LUs. For NRJE, each LU class may
contain only one LU.
LU-LU session:
A connection between two LUs.
LU.T1:
Logical Unit Type 1. A program or set of programs within a node that
provides communication between application programs and data processing
programs using interactive or batch data transfer. Character oriented
printer devices, batch support (RJE), and the SNA Character String (SCS)
are supported.
LU.T2:
Logical Unit Type 2. A program or set of programs within a node that
provides application program to 3270-type display station communication
using interactive data transfer. IBM 3270 data stream capability and
3270-type display station support is provided.
LU.T3:
Logical Unit Type 3. A program or set of programs within a node that
provides application program to printer communication. IBM 3270 data
stream capability is provided. Many devices support both LU.T1 and LU.T3
print requests.
MPE V:
Multiprogramming Executive V. An operating system for the Hewlett-Packard
3000 computer, Series 37 through 70. MPE V consists of programs that
handle exchanges between HP terminals, printers, and executing programs
and the internal HP 3000 Communications Services.
MPE XL:
Multiprogramming Executive XL. An operating system for the
Hewlett-Packard 3000 computer, Series 930 and 950. MPE XL consists of
programs that handle exchanges between HP terminals, printers, and
executing programs.
MVS:
Multiple Virtual Storage. An IBM operating system that is an extension
of OS/MVT. MVS also is called OS/VS2 Release 2.
MVT:
Multiprogramming with a Variable number of Tasks. An IBM operating
system that supports multiple programming with a variable number of tasks
on the System/360.
Native Language Support (NLS):
An HP product that allows the HP 3000 to produce localized application
programs for end users without reprogramming for each language or
country.
NAU:
Network Addressable Unit. Either a program or a group of programs that
represents the source and destination of data in a network. The three
kinds of network addressable units are SSCP, LU, and PU.
NCP:
See ACF/NCP.
NLS:
See Native Language Support.
NM capability:
Node Management capability. An MPE user capability required for SNA IMF
operator tasks. The node manager configures an SNA service on the HP
3000.
node:
A basic component of an SNA network, which consists of a set of hardware
devices and associated software that are at the end of a data link.
Specifically, nodes within an SNA network can be distributed or host
processors, communications controllers, cluster controllers, or
terminals.
Node Management Services (NMS):
A set of utilities on the HP 3000 that handles link and node level
startup and shutdown, logging, tracing, and diagnostic functions. On MPE
V, NMS is part of the SNA Link/V product. On MPE XL, NMS is part of the
Fundamental Operating System.
Node Type 1:
A terminal or printer.
Node Type 2:
A cluster controller, such as the IBM 3274.
Node Type 4:
A communications controller such as the IBM 3705, 3720, and 3725.
Node Type 5:
A host processor with a System Services Control Point (SSCP).
non-transparent mode:
A mode of SNA IMF operation in which the internal screen image holds a
character-by-character image of an IBM 3278 screen. This image is
accessible by the SNA IMF intrinsics.
NRJE:
Network Remote Job Entry. A Hewlett-Packard product that uses IBM's
SNA/SDLC protocol to emulate an IBM 8100 Distributed Processing Program
RJE workstation. This emulation allows users on the HP 3000 to submit
batch jobs, through an SNA network, to an IBM host or compatible
mainframe for processing. The host can then send the output back to the
HP 3000 for printing or storing on disc.
Pass Thru:
An SNA IMF application program that uses SNA IMF intrinsics to allow
certain HP terminals attached to an HP 3000 to emulate, with some
differences, IBM 3278 display stations and IBM 3287 printers connected to
an IBM host.
physical unit (PU):
A set of SNA components that provide services that manage and monitor the
resources of a node. Each node, whether a control unit, terminal,
controller, or processor, contains one physical unit.
programmatic access mode:
A form of programmatic communication using SNA IMF that allows programs
on the HP 3000 to access host programs such as CICS, IMS, and TSO through
a set of high-level intrinsics. To the host, the HP 3000 program using
SNA IMF intrinsics looks like either an IBM 3278 display station or an
IBM 3287 printer.
PSI:
Programmable Serial Interface. A hardware portion of SNA/SDLC Link/XL
and SNA/X.25 Link/XL that implements the Physical Control and Data Link
Control layers of SNA.
Request Unit (RU):
A message unit that contains control information such as a request code
or function management headers, end-user data, or both.
Response Unit (RU):
A message unit that acknowledges a Request Unit. If positive, the
Response Unit may contain additional information (such as session
parameters in response to BIND SESSION), or if negative, contains sense
data defining the exception condition.
rolling softkeys:
A feature of SNA IMF that allows you to define several levels of softkey
functions, giving you up to 96 softkey functions for your 8 (or 16)
terminal function keys.
SCS:
See SNA Character String.
SDLC:
Synchronous Data Link Control. A protocol for managing synchronous,
code-transparent, serial-by-bit information transfer over a link
connection. Transmission exchanges may be full-duplex or half-duplex
over switched or nonswitched links. The configuration of the link
connection may be point-to-point, multipoint, or loop.
security video:
An SNA IMF feature that emulates the non-display feature of an IBM 3278
display station. Security video allows you to type data into a
non-display field without having the data appear on your screen.
session:
A logical connection between Network Addressable Units.
Shift-in (SI):
The control code with the hexadecimal value of `0F' that is used in the
data stream to signal the end of a sequence of Asian (DBCS) characters.
Shift-out (SO):
The control code with the hexadecimal value of `0E' that is used in the
data stream to signal the beginning of a sequence of Asian (DBCS)
characters.
SNA:
Systems Network Architecture. A comprehensive specification for
distributed data processing developed by IBM in 1974. SNA defines rules,
procedures, and a layered protocol for communication and control within a
network.
SNA Character String (SCS):
A character string composed of EBCDIC control characters, optionally
intermixed with end-user data, that is carried within a Request Unit
(RU).
SNA IMF:
SNA Interactive Mainframe Facility. An HP product that emulates a remote
IBM 3274 Cluster Controller with attached IBM 3278 display stations and
IBM 3287 printers. SNA IMF provides interactive communication between an
HP 3000 and an IBM host computer in an IBM SNA environment.
SNA Link/V:
Bundled software and hardware that provides a logical and physical
connection between an HP 3000, with MPE V, and an SNA network. SNA
Link/V consists of the following:
Node Management Services (NMS) - software
SNA Transport - software
INP and cable - hardware
SNA/SDLC Link/XL:
Bundled software and hardware that provides a logical and physical
connection between an HP 3000, with MPE XL, and an SNA network. SNA/SDLC
Link/XL consists of the following:
* SNA Transport - software
* PSI and cable - hardware
SNA NRJE:
See NRJE.
SNA Service:
A Hewlett-Packard software product that provides the user interface to an
SNA network. An SNA Service implements the upper three SNA layers; Data
Flow Control, Function Management Data Services, and NAU Services
Manager. SNA IMF, SNA NRJE, and LU 6.2 API are examples of SNA services.
SNA Transport:
Software residing immediately below SNA IMF that provides the functions
of the Path Control and Transmission Control layers and manages all the
sessions with the host SSCP. SNA Transport is part of the SNA link
product.
softkey:
The application-dependent function of a terminal function key. Softkeys
for SNA IMF are configured in the PTCONFIG file.
split order:
A condition that occurs when SCS control codes or parameters span RU
boundaries within an RU chain.
SSCP:
Systems Services Control Point. A part of the SNA host node that helps
to manage configurations, does problem solving, controls network
operations, and provides other session services for end users. An SSCP
exists only in the host and is exercised by the host's communications
access method.
Time Sharing Option (TSO):
An IBM communications monitor. TSO lets you develop programs and edit
text by logging on to a remote terminal that is connected to an IBM
system.
transparent mode:
A mode of SNA IMF operation that allows your application program to
obtain the untranslated data stream when transferring data between the
host and the HP 3000.
User-Defined Command (UDC):
A command that you define in a file on MPE and set with the SETCATALOG
command. Once you have set the UDC, you can type its name at the MPE
colon prompt, and MPE will carry out the instructions in the file.
VM:
Virtual Machine. An operating system that allows an IBM mainframe to run
simultaneously several different operating systems, including multiple
copies of CMS. These different operating systems run under VM.
VTAM:
See ACF/VTAM.
XDS:
See extra data segment.