NVT
Click on the red underlined text to get to the source
... should be rejected unless they are specifically handled by the client
for NVT mode.
...
... servers start a client connection using an NVT telnet dialog to
establish parameters needed to complete the TN3270 ...
...
If the telnet server wishes to go back to NVT mode, it may issue the
following telnet options:
...
... TN3270 session. The telnet
client would then process data from the server as though it were NVT
ASCII data.
...
... 9] is negotiated by those servers that make use of
the telnet NVT mode to allow the user to enter information prior to
negotiating the options necessary for TN3270. This information
...