WHAT IS MEANT BY TERMINAL MODE

 Immediately after starting Telix, and for most of the time
 while using it, you will be in Telix's terminal mode. While in
 this mode any normal (ASCII) characters you type will be sent
 to the modem port, and any incoming characters will be printed
 on the screen. It is from the terminal mode that most Telix
 commands are initiated. Most commands are selected by pressing
 two keys at the same time. For example, to access the dialing
 directory, you would press Alt-D. That is, while holding down
 the Alt key, you press the D key.