IBM 3174 Introduction

Medium-Cluster Controllers
3174 Model51R
3174 Model61R
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Figure 3-2. 3174 Controller Models 51R, 61R, 52R, 62R, 53R, and 63R
The 3174 Model 51R (shown in Figure 3-2) is a medium-cluster controller designed
for remote operations. It contains a Type 1 Communication Adapter that provides
EIA 232D/CCITT V.24 and CCITT V.35 interfaces for SNA/SDLC, BSC, or X.25
remote
link attachment. It has 1MB of 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 nine-port terminal adapter supports nine terminals
directly or sixteen 3270 terminals and eight ASCII terminals through one or two
IBM 3299 Terminal Multiplexers.
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 51 R supports full
keyboard utilities.
Subsystem
online tests and problem determination are performed through a
control
unit terminal attached to any port or multiplexer without interrupting other
terminals attached to the 3174. Offline tests are performed through the 3174
control panel.
The
customer can install the following features:
Second diskette drive
Token-Ring Network Gateway feature
Asynchronous Emulation Adapter
type 3 Communication Adapter
Storage Expansion
20MB Fixed Disk
Drive
Type 3A Communication Adapter
Concurrent Communication Adapter
(see note).
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 61R
is a medium-cluster controller designed for remote
operations.
It contains a Type 1 Communication Adapter that provides EIA
232D/CCITT V.24 and CCITT V.35 interfaces for SNA/SDLC, BSC, or X.25 remote
link attachment. It has 2MB of base storage and one 5-1/4-inch, 2.4MB,
high-capacity diskette drive.
If the controller has one diskette drive and uses
devices that requi re downstream load microcode, a second diskette
drive or fixed
disk must be installed. A nine-port terminal adapter supports nine terminals
Chapter 3. Models of the 3174 Establishment Controller 3-7

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English