|Cause||Method of Clearing|
|Terminal not connected to computer. Communication line signals are not correct for communication.||Cleared when a connection exists between computer and terminal. Check CTS and DSR indicators to determine if a connection exists.|
|Half-duplex communication is selected (by modem control SET-UP feature) and terminal is receiving characters. Terminal cannot transmit characters when receiving characters in half-duplex.||Cleared when line turns around and terminal can transmit characters.|
|Characters are typed into terminal faster than they can be transmitted.||Cleared when terminal transmits characters in keyboard character buffer to computer.|
|A print operation selected while offline.||Cleared when print operation ends.|
|Computer turns off keyboard.||Computer turns on keyboard.|
NOTE: Entering and exiting SET-UP with KBD LOCKED on erases the keyboard character buffer and cancels printing or print operation requests.