IBM SY44-5902-05 manual EBCDIC. See extended binary-coded decimal interchange code

DPR. In data communications, digit present.

DSC. In data communications, distant station connected.

DRS. In data communications, data signal rate selector.

DSA. (1) Direct select address. (2) Directory system agent.

DSR. In data communications, data set ready. DST. See dedicated service tools.

DTE. In data communications, data terminal equipment.

DTR. In data communications, data terminal ready.

EBCDIC. See extended binary-coded decimal interchange code.

EEPROM. Electrically erasable programmable read only memory.

EPF. Enable panel (sub)function.

extended binary-coded decimal interchange code. A coded character set of 256 eight-bit characters.

fault. An accidental condition that causes a functional unit to fail to perform its required function.

fax. To transmit an image using a telephone system and facsimile machines.

facsimile machine. A functional unit that converts images to signals (from a telephone system) or that converts received signals back to images.

fiber optics. The technology of guiding optical power (light) through thin, transparent strands (fibers) that are made of glass, fused silica, or plastic.

frame. A general term which refers to a rack or expansion unit.

frame relay. A protocol for routing frames through the communications network.

FSIOA. File server input/output adapter.

FRU. Field-replaceable unit.

GND. Ground (electrical).

guest partition. Select this option if the partition being created will not have licensed internal code and OS/400 installed, and instead is intended to use another operating system such as Linux.

HDLC. High-level data link control.

HIPER. High impact or pervasive APAR

HRI. (1) Hardware resource information. (2) Human readable interpretation.

ICT. I/O configuration table.

ID. Identification.

IDE. Interactive device exerciser.

IDLC. Integrated Services Digital Network Data Link Control

IND, IND-A,IND-B.In data communications, indicator (A and B refer to each individual signal of a differential pair of signals).

initial program load (IPL). The process that loads the system programs from the system auxiliary storage, checks the system hardware, and prepares the system for user operations.

input/output. Data provided to the computer or data that results from computer processing.

input/output processor. One or more circuits that process programmed instructions. It controls one or more input and, or output device or adapters.

installation IPL. The process of loading code into main storage and preparing for system operation from an input/output hardware unit other than the system’s primary load-source disk unit. This is also referred to as a type D IPL or D-mode IPL.

installation device. A tape or optical device [CD-ROM or a DVD] that is used on a type D IPL to load Licensed Internal Code (LIC) segments into main storage. The installation device must be on the same input/output processor (IOP) as the load source. This device can be used to load LIC code from the tape or optical device onto the load source during restore or installation operations.

intelligent printer data stream (IPDS). An all-points-addressable data stream that allows users to position text, images, and graphics at any defined point on a printed page.

intermittent. Occurring or appearing in interrupted sequence.

I/O. See input and, or output.

IOA. Input/output adapter.

IOBU. I/O bus unit.

IOP. See input/output processor.

IPDS. See all-points-addressable data stream.

IPI-3.The IBM implementation of the proposed ANSI/X3T9.3 standard defining the electrical, data link protocol, and functional interface.

Glossary of Terms and Abbreviations 327