IBM 3174 Introduction

Security: Password access to the adapter is provided, and session security is
supported. When an
ASCII device is in session with an IBM host and either
disconnects or exceeds the configurable inactivity timer, the 3174 terminates the
session. Security cannot be provided
for host subsystems or applications (such as
the
Information Management System [IMS]) that retain data between sessions in
the expectation that the same logical unit
will come into session again.
If sensitive data is sent over external communication facilities, an encryption
scheme outside the capabilities of this feature should be used.
2.4MB Diskette Drive and 2.4MB Diskette
Either a 2.4MB diskette drive or a 1.2MB diskette drive is supported on all models
of the controller.
Some models support both.
The 1.2MB diskette
drive is supported on all models of the 3174. Models 1 L, 1 R,
2R, 3R, 51 R, 52R, and 53R can be upgraded from a 1.2MB to a 2.4MB diskette drive.
Models
81 Rand 82R cannot.
Models
11 L, 11 R, 12R, and 13R that are ordered with Configuration Support-A or -S,
Release 5.0, are shipped with a 1.2MB diskette drive. In this case, these models do
not support the 2.4MB diskette drive.
If Models 11 L, 11 R, 12R, and 13R are ordered with Configuration Support-B, they
are shipped with a 2.4MB diskette drive. If a second drive is installed, it must be a
2.4MB diskette drive.
For Configuration Support-A,
-S, Models 61 R, 62R, and 63R are shipped with a
2.4MB diskette drive;
If a second drive is installed, it must be a 1.2MB drive. For
Configuration Support-B, these models
are shipped with a 2.4MB drive, and a
second
drive must be a 2.4MB diskette drive. Models 81 Rand 82R are shipped with
a 1.2MB diskette drive; Models
91 Rand 92R are shipped with a 2.4MB diskette
drive. Models
81 R, 91 R, 82R, and 92R do not support a second diskette drive.
The 2.4MB diskette
drive supports 2.4MB diskettes and 1.2MB diskettes. The
1.2MB diskette
drive does not support 2.4MB diskettes.
20MB Fixed Disk Drive
The 20MB Fixed Disk Drive can be installed in all models of the 3174 except
models 81 R, 91 R, 82R, and 92R. This feature is functionally equivalent to the
diskette
drives available for the 3174. The advantage of this feature is the
increased
direct access storage device (DASD) storage, which also increases
usability by reducing diskette swapping.
Two fixed
disk drives can be installed on 3174 Models 1L, 11L, 1R, 11R, 2R, 12R,
3R, and 13R, and one can be installed on models
51 R, 61 R, 52R, 62R, 53R, and 63R.
The 20MB Fixed Disk cannot be installed on
controller models 81R, 91R, 82R, or
92R.
2-6 IBM 3270 Information Display System 3174 Establishment Controller Introduction

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English