IBM ThinkPad 130 Introduction Manual Download

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configuration data file (CDF). A MOSS file that
contains a description of all the hardware features
(presence, type, address, and characteristics).

control panel. A panel that contains switches and
indicators for the customer's operator and service
personnel.

control program. A computer program designed to
schedule and to supervise the execution of programs of
the controller.

control subsystem. The part of the controller that
stores and executes the control program, and monitors
the data transfers over the channel and transmission
interfaces.

customer engineer. See IBM service representative

data circuit-terminating equipment (DCE). The
equipment installed at the user's premises that provides
all the functions required to establish, maintain, and
terminate a connection, and the signal conversion
between the data terminal equipment (DTE) and the
line. For example, a modem is a DCE.

Note: The DCE may be a stand-alone equipment or
integrated in the 3745.

data host. A host running application programs only.

direct attachment. The attachment of a DTE to
another DTE without a DCE.

direct-current interlock (DCI). A mode of data
transmission over an I/O interface to enable
communication between data processing systems
through a channel.

direct memory access (DMA). Mechanism permitting
an adapter to access the storage without any control
program interaction.

diskette. A thin, flexible magnetic disk, and its
protective jacket, that records diagnostics, microcode,
and 3745 files.

DTE (data terminal equipment). That part of a data
station that serves as a data source, data link, or both,
and provides for the data communication control
function according to protocols.

duplex transmission. Data transmission in both
directions at the same time. Contrast with half-duplex.

EIA 232D, 336, 547. EIA recommendations on
transmission interface

Emulation Program (EP). An IBM licensed program
that allows a channel-attached communication controller
to emulate the functions of an IBM 2701 Data Adapter
Unit, an IBM 2702 Transmission Control, an IBM 2703

Transmission Control, or an IBM 3705 Communication
Controller.

error recovery. The process of correcting or
bypassing the effects of a fault to restore a computer
system to a prescribed condition.

Ethernet LAN adapter (ELA). Line adapter for

Ethernet-type network, composed of one communication

scanner processor card (CSP), and one Ethernet

adapter card (EAC).

Ethernet-type subsystem (ESS). The part of the

controller that controls the data transfers over an

Ethernet V2 or IEEE 802.3 local area network.

half-duplex. Data transmission in either direction, one
direction at a time. Contrast with

duplex.

high-performance transmission subsystem
(HPTSS). The part of the controller that controls the
data transfers over the high-speed transmission
interface (speed up to 2 Mbps).

high-speed scanner. Line adapter for lines up to two
million bps. It is composed of a communication scanner
processor (CSP) and a front-end high-speed scanner
(FESH).

high-speed transfer. A mode of high-speed data
transmission over an I/O interface to enable
communication between data processing systems
through a channel.

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
performs maintenance services for IBM products or
systems.

initial microcode load (IML). The process of loading
the microcode into a scanner or into MOSS.

initial program load (IPL). The initialization procedure
that causes the 3745 control program to begin
operation.

input/output control (IOC). The circuit that controls
the input/output from/to the channel adapters and
scanners via the IOC bus.

internal clock function (ICF). A LIC function that
provides a transmit clock for sending data, and retrieves
a receive clock from received data, when DCEs or

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IBM 3745 Models 130, 150, 170: Introduction