CONTROLS AND DISPLAY
14
Front Display -
This is a dot-matrix graphical LCD (Liquid Crystal Dis-
play). The display backlight can be programmed to turn on when any key
is pressed or when the Backlight option switch is pressed (see page 20).
DTMF Keypad -
The full keypad, 17-key models include the keys
required to dial telephone, unit ID, and group ID numbers and also to
enter numbers during for keypad programming.
F1 - F4 -
These keys are available with both full and limited keypad
models, and they can be system operator programmed to control a
specific function. The key functions can be different for each operating
mode (see page 11). Other programmable option switches are located on
the top and side panels (see preceding information).
Summary of Contents for 51 Series
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