A
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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.
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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.
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B
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baud | | A measure of signaling speed equal to the number
of signal changes or events per second. Baud often refers to bits per
second.
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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.
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C
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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.
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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
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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.
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control unit (CU) | | A device that controls input and output for one or
more devices such as printers or display stations.
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D
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data stream mode | | See transparent
mode.
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DBCS | | Double-Byte Character Set. A character set that
includes one- and two-byte characters, used by many Asian countries.
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E
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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.
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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.
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F
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FMD | | Function Management Data Services. A generic term that
describes both session presentation and session network services.
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function keys | | The HP terminal keys [f1] through [f8], or the IBM 3278 keys [PF1] through [PF24].
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H
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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.
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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.
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host | | A central computer that provides services for other computers
and terminals attached to it.
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I
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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.
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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.
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INP | | Intelligent Network Processor. A hardware portion
of SNA Link/V that implements the Physical Control and Data Link Control
layers of SNA.
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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.
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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.
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L
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link | | The physical or logical connection between two devices in
a network.
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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.
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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.
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LU-LU | | A connection between two LUs.
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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.
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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.
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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.
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M
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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.
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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.
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MVS | | Multiple Virtual Storage. An IBM operating system
that is an extension of OS/MVT. MVS also is called OS/VS2 Release
2.
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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.
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N
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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.
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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.
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NCP | | See ACF/NCP
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NLS | | See Native Language Support.
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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.
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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.
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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.
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Node Type 1 | | A terminal or printer.
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Node Type 2 | | A cluster controller, such as the IBM 3274.
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Node Type 4 | | A communications controller such as the IBM 3705, 3720,
and 3725.
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Node Type 5 | | A host processor with a System Services Control Point
(SSCP).
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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.
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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 disk.
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P
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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.
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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.
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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.
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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.
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R
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Request Unit (RU) | | A message unit that contains control information
such as a request code or function management headers, end-user
data, or both.
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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.
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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.
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S
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SCS | | See SNA Character String.
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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.
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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.
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session | | A logical connection between Network Addressable Units.
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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.
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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.
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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.
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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).
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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.
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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
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SNA NRJE | | See NRJE
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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.
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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.
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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:
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softkey | | The application- dependent function of a terminal function
key. Softkeys for SNA IMF are configured in the PTCONFIG file.
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split order | | A condition that occurs when SCS control codes or parameters
span RU boundaries within an RU chain.
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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.
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T
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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.
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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.
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U
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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.
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V
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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.
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VTAM | | See ACF/VTAM
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X
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XDS | | See extra data segment.
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