IBM 3174 Reference Guide

Connecting to a Host
Introduction
This chapter describes the two operating modes you can use for an ASCII terminal.
These modes are:
Using your ASCii Terminal as a 3270 terminal: With this function, you can use your
ASCII terminal or printer as a 3270 terminal or printer. This allows your ASCII
terminal or printer to connect to a 3270 host. See "Using Your ASCII Terminal" on
page 3-6 and "Using an ASCII Printer as a 3270 Printer" on page 3-21.
Connecting to an ASCII host: With this function, your ASCII terminal can connect
to ASCII hosts or to public data networks through the 3174 Establishment
Controller. See "ASCII Host Communications" on page 3-23.
Differences When Using Your ASCII Terminal as a 3270 Terminal
You must become familiar with your specific terminal type to use the functions It
provides. Following are some of the differences you may see between using an
actual 3270 terminal and using your ASCII terminal as a 3270 terminal.
• Response time may Increase because of the line transmission speed.
• Some display station features, such as Indicator lines and Intensify
capabilities, are not available.
• Differences between the ASCII display keyboards and the 3270 keyboards
sometimes require a two- or three-key sequence to achieve the effect of
pressing one key on a 3270 keyboard.
• For printers. Set Line Density Is not available. Also, many printers are limited
In the use of PA or Cancel keys and Indicator lights.
• Changing the printer address works a little differently. The cursor does not
move to the printer address digits In the Indicator line when you press the
IDENT key, as It would on a 3270 terminal. Instead, the cursor remains where
It was, but when the address digits are keyed In, they appear at the proper
place In the Indicator line.
Connecting to a 3270 Host
The following steps tell you how to connect to a 3270 host with an ASCII terminal.
1. Turn on the power for your ASCII terminal.
a. If you are connected through a switched line, dial In.
1)
Auto-call modem: Enter the dial digits from your keyboard. For
example, type AID 3853426 for an IBM 5841 or 5842 modem. You may
receive messages from the modem. The modem procedures can be
found In your modem documentation.
2) Normal dial modem: Make the connection from your phone, listen for
the answer tone, and switch the phone appropriately.
b. If you are connected through a direct or nonswitched line, follow your local
log-on procedure.
c. If you are not sure what kind of connection you have, ask your system
administrator.
3-2 3174 Establishment Controller Terminal User's Referencefor Expanded Functions

IBM 3174 Specifications

General

Brand	IBM
Model	3174
Category	Controller
Language	English