User's Manual

10-5
IBM 5250 Emulation
Network Virtual Terminal Mode
Network Virtual Terminal (NVT) mode allows the operator to communicate with a
network gateway (in ASCII) for routing, logon etc, before the full IBM terminal
emulation protocol is established. NVT mode is indicated by the absence of the
symbol in the status line along the bottom of the window. NVT mode displays an
unformatted screen for data entry, allowing basic keyboard functionality as a simple
ASCII terminal. In addition to data keys, other recognized keys are:
Clear clears the screen
Enter sends a CR to the host
Newline sends a CR to the host
Backspace sends a BS to the host
Tab sends an HT to the host
Once the appropriate details have been entered to establish an IBM host session (which
may be automatic), the screen is cleared and switched into full IBM 5250 terminal
emulation mode, as indicated by the
symbol in the status line.
The Status Line
The last line in the window is used to display status information in the form of
symbols and alphanumeric characters. A coloured line separates status information
from the rest of the display. Information is displayed in any of six regions within the
status line as listed below.
Region Symbol Colour Column Meaning
1 T Blue 1 Telnet session running
2
Blue 18 On line (IBM 5250 mode)
3 M Blue 28 Message waiting
4 ^ Blue 48 Insert mode on
5
Red 57 Input inhibited
6 rr/cc or rr/ccc White 75-80 Row/column cursor position
The meaning of the symbols is as follows:
T Indicates that a Telnet session is running.
Indicates that the current screen is an IBM 5250 screen. This screen will be
displayed when you have initiated a Telnet session with the host.
M Indicates that the system has one or more messages waiting for you.
^ Indicates that the keyboard is in Insert mode. Already existing characters to the
right of the cursor will move to make room for new characters that are entered.