ENTER Key
On a menu, the ENTER key is used to navigate to the submenu highlighted by the cursor.
When entering or selecting a new value, the ENTER key is used to accept the new value
and a further press of the ENTER key is (generally) required to move to the next screen
Note that when a new value is accepted, it is applied to the modem hardware
immediately.
BACK Key
On a menu, the BACK key is used to navigate to the previous screen. When entering or
selecting a new value, the BACK key is used to cancel any change to the current value
and move backwards to the previous screen.
6.3.1.3 Alphanumeric Keys
The alphanumeric keys provide numeric entry. Where it is valid to enter alphabetic
characters, repeated pressing of a numeric key will cause the key to cycle through its
associated lower-case and then upper-case alphabetic characters.
6.3.1.4 Special Function Keys
Help
Help information can be displayed for any M&C control by holding down the 0 key and
pressing the Left arrow key together while the screen containing the M&C control is
displayed. This brings up scrollable text that explains the M&C control’s function.
Pressing the 0 key and Left arrow key together for a second time removes the Help text
and reverts the display back to its previous contents.
Keyboard Lock
The keypad can be locked against inadvertent use by holding down the 0 key and
pressing the MAIN key together at the same time. Pressing the two keys again at the
same time unlocks the keypad.
LCD Contrast
The contrast of the LCD display can be adjusted by holding down the 0 key and pressing
the Up (or Down) arrow key together at the same time. The Up arrow key increases the
contrast and the Down arrow key decreases the contrast.
LCD Backlight
The LCD backlight can be dimmed or brightened by holding down the 0 key and pressing
the Up or Down arrow key together at the same time.
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