Duplex mode

Sets the emulation duplex mode. Values are

Full
This is normally used when communicating with UNIX systems, computer systems such as large mainframes or timesharing systems like CompuServe, or a local hobbyist bulletin board. In full-duplex mode, characters typed on the local keyboard are echoed to the screen by the remote system, not by the terminal itself. Full duplex is the default mode.
Half
Typed characters are immediately displayed on the screen before being sent over the communications line. This is sometimes also called "local echo." Half-duplex mode is seldom used except for communicating with older time-sharing systems.
Mnemonic
This mode is reserved for debugging purposes and causes escape and control sequences to be passed through and displayed on the screen. This is useful for determining exactly what the TinyTERM Emulator is receiving in terminal mode.
Control
This mode is necessary for transferring files from a remote computer. This should be selected if your machine will only be used as the host computer during file transfers and never used in terminal mode.
Dump
This is similar to mnemonic mode but displays all data as two-digit hexadecimal characters.