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IBM 3270 Emulation
Network Virtual Terminal Mode
302
Network Virtual Terminal Mode
Network Virtual Terminal (NVT) mode allows the operator to com-
municate in ASCII format with a network gateway for routing, logon
etc, before the full IBM terminal emulation protocol is established.
The following symbol is displayed on the status line when in NVT
mode:
NVT mode displays an unformatted screen for data entry, allowing
most of the keyboard functionality for local editing. However, when
the Enter key is pressed, the line that the cursor is positioned on will
be sent over Telnet as an ASCII string with CR/LF terminators. The
cursor will then be positioned at the start of the next line. ASCII data
received over Telnet will also be displayed at the current cursor
position. A CR character will be actioned as a 'new line' character,
causing the cursor to move to the start of the next line, scrolling the
display if necessary.
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 3270 terminal emulation mode, as indicated
by the following status line symbol:
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