IBM 3174 Introduction

Single Link Multi-Host Support
Whereas the Concurrent Communication Adapter is an installable feature, Single
Link Multi-Host Support is provided entirely in the microcode. It is accessed
through a customization option.
Single Link Multi-Host Support provides access to a maximum of eight
IBM host
processors that
are attached to the same Token-Ring Network. This access is
concurrent and
enables any terminals that are attached to a 3174 model 3R, 13R,
53R,
or 63R to communicate with up to five of the hosts on the network. (Up to
eight hosts can be
linked to these controllers; the attached terminals can
communicate with up to five of the eight hosts.)
Customizing
for this option does not affect compatibility with existing host
interfaces, host software
or protocols, or 3174 features and functions. Non-gateway
controllers that connect to a Token-Ring Network support this option. They are
models 3R, 13R, 53R, and 63R.
Note: Other models that can be alternately configured to act as these models can
support
this option. See "Table of Alternate Controller Configurations" on
page
A-B.
For more information about the Single Link Multi-Host Support option, see your
IBM marketing representative.
Central Site Customizing Utility (CSCU)
With Central Site Customizing (see Figure 2-3), one set of microcode update
diskettes is sent to the central site
for use in creating updated diskettes that are
distributed to network controllers. This is actually accomplished through a diskette
utility program that allows for generating, maintaining, and storing customizing
parameters, and
for generating customized microcode for all the network
controllers.
3174
Customizing
Data File--+
3174
3174
Figure 2-3. Central Site Customizing - Manual Distribution
2-12 IBM 3270 Information Display System 3174 Establishment Controller Introduction
3174

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English