This is the keystroke sequence used to enter the CLI. This sequence must have at least one character. The caret symbol (^) has a special meaning in this sequence. It denotes 'Ctrl' for keystrokes that map to Ctrl sequences (for example, ^[ for the escape key and ^M for carriage return). All ocurrences of ^ will be interpreted as part of a Ctrl sequence. Refer to an ASCII-to-key conversion table for a complete list of Ctrl sequences. The default value for this field is '^[(' i.e. ESC followed by (.