IBM 3174 Introduction

3174 Model 2R
3174 Model12R
interrupting other terminals attached to the 3174. Offline tests are performed
through the 3174
control panel or through a control unit terminal attached to port 0
only.
Features that the customer can install on a Model 11 Rare:
Second diskette drive
Token-Ring Network Gateway feature
Asynchronous
Emulation Adapter
20MB Fixed Disk Drive
Terminal Multiplexer Adapter
Storage Expansion
Concurrent Communication
Adapter
Type 3A Communication Adapter.
The 3174
Model 2R is a large-cluster controller designed for remote operations. It
contains a Type 2 Communication Adapter that provides an X.21 interface (CCITT
V.11) for SNA/SDLC or X.25 remote link attachment. It has 1 MB base storage and
one 5-1/4-inch, 1.2MB, high-capacity diskette drive.
If the controller has one
diskette
drive and uses devices that require downstream load microcode, a second
diskette
drive or fixed disk must be installed. A four-port terminal adapter that
attaches
IBM 3299 Terminal Multiplexers and Terminal Multiplexer Adapters (a
special feature) supports a maximum of thirty two 3270 terminals and 24 ASCII
terminals.
Customizing is performed with a control unit terminal attached to port 0 of the 3174.
Any terminal can be attached to port 0 at other times. The Model 2R supports full
keyboard uti I iti es.
Subsystem
online tests and problem determination are performed through a
control unit terminal attached to any port or multiplexer. This can be done without
interrupting other terminals that are attached to the 3174 controller. Offline tests
are performed through the 3174 control panel.
The customer can install the following features on the Model 2R:
Second diskette drive
Token-Ring Network Gateway feature
Asynchronous
Emulation Adapter
20MB Fixed Disk Drive
Concurrent Communication
Adapter
(see note)
Terminal Multiplexer Adapter
Storage Expansion
Encrypt/Decrypt
Adapter
Type 3 Communication Adapter
Type 3A Communication Adapter.
Note: If you want to install the Concurrent Communication Adapter on this
controller model, you must replace the 1.2MB diskette drive with a 2.4MB
diskette
drive or a fixed disk and have Configuration Support-B.
The 3174
Model 12R is a large-cluster control unit designed for remote operations.
It contains a Type 2 Communication Adapter that provides X.21 interface (CCID
V.11) for SNA/SDLC or X.25 remote link attachment. It has 2MB base storage and
one 5-1/4-inch, high-capacity diskette drive.
If this controller is shipped with
Configuration Support-A
or -S, Release 5, the diskette drive is 1.2MB. If the
controller is shipped with Configuration Support-B, the drive is 2.4MB. If the
controller has one diskette drive and uses devices that require downstream load
microcode, a second diskette drive or fixed disk must be installed. A four-port
terminal adapter that attaches IBM 3299 Terminal Multiplexers and Terminal
3-4 IBM 3270 Information Display System 3174 Establishment Controller Introduction

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English