Glossary

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.

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.

A measure of signaling speed equal to the number of signal changes or events per second. Baud often refers to bits per second.

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.

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.

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

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.

A device that controls input and output for one or more devices such as printers or display stations.

See transparent mode.

Double-Byte Character Set. A character set that includes one- and two-byte characters, used by many Asian countries.

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.

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.

Function Management Data Services. A generic term that describes both session presentation and session network services.

The HP terminal keys [f1] through [f8], or the IBM 3278 keys [PF1] through [PF24].

A component of an SNA network that provides FMD services and data flow and transmission control for one of the sessions of an NAU.

High-level Data Link Control. A bit-oriented data link protocol used in full-duplex communications. HDLC was developed by the International Standards Organization.

A central computer that provides services for other computers and terminals attached to it.

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.

Information Management System (IMS). An IBM program product that provides data communication interfaces between application programs and terminals and between application programs and databases.

Intelligent Network Processor. A hardware portion of SNA Link/V that implements the Physical Control and Data Link Control layers of SNA.

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.

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.

The physical or logical connection between two devices in a network.

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.

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.

A connection between two LUs.

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.

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.

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.

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.

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.

Multiple Virtual Storage. An IBM operating system that is an extension of OS/MVT. MVS also is called OS/VS2 Release 2.

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.

An HP product that allows the HP 3000 to produce localized application programs for end users without reprogramming for each language or country.

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.

See ACF/NCP

See Native Language Support.

Node Management capability. An MPE user capability required for SNA IMF operator tasks. The node manager configures an SNA service on the HP 3000.

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.

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.

A terminal or printer.

A cluster controller, such as the IBM 3274.

A communications controller such as the IBM 3705, 3720, and 3725.

A host processor with a System Services Control Point (SSCP).

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.

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.

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.

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.

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.

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.

A message unit that contains control information such as a request code or function management headers, end-user data, or both.

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.

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.

See SNA Character String.

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.

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.

A logical connection between Network Addressable Units.

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.

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.

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.

A character string composed of EBCDIC control characters, optionally intermixed with end-user data, that is carried within a Request Unit (RU).

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.

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:

See NRJE

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.

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.

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:

The application- dependent function of a terminal function key. Softkeys for SNA IMF are configured in the PTCONFIG file.

A condition that occurs when SCS control codes or parameters span RU boundaries within an RU chain.

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.

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.

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.

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.

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.

See ACF/VTAM

See extra data segment.