Installation guide

3270 Terminal Emulation (TN3270) Access Problems
7-2
TN3270 Connection Problems
Introduction
If you experience problems with TN3270 connections and keymap functions, verify the
following:
• TN3270 model configuration
• ASCII terminal configuration
• TN3270 session status line
• Keyboard mapping
• Telnet negotiations
Verify Display Station Model Configuration
If a connection to an IBM system does not display formatted screens, verify that your
display station model is configured properly. The TN3270 software enables an ASCII
terminal to emulate either an IBM 3278 Display Station Model 2 or an unformatted screen.
To determine if the IBM 3278 Display Station model type used for TN3270 emulation is
configured properly, enter the following command:
Local> SHOW PORT 1 TN3270 CHARACTERISTICS
Port 1: test
Model: NONE Input Flow Control: Enabled
Terminal: VT100 Output Flow Control: Enabled
Keymap Default: VT100 Verification: Enabled
Keymap NVRAM Limit: 0 Switch Character: Enabled
Nulls: 3179
If the Model setting does not reflect your configuration, enter the following command
(enter Model 2 for an IBM 3278 Display Station Model 2 or NONE for an unformatted
screen):
Local> CHANGE PORT 1 TN3270 MODEL 2
Display Station Models 3, 4, and 5 are not supported.
NOTE