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Programming at a 4424LD+ or MLX-20L Telephone
The 4424LD+ and MLX-20L telephones are the only telephones that can be used as a system programming console (see 4424LD+ Telephone and MLX-20L Telephone). For initial programming of a new system, the 4424LD+ or MLX-20L telephone must be connected to the first extension jack on the first TDL or MLX module, respectively.
For subsequent programming, the jack assignment can be changed. The system operator jack can be used, or a separate system programming jack can be designated to allow programming of the system without interfering with system operator call handling.
The buttons next to the console's display are used to do most of the programming.
The top two buttons on each side are labeled and have the same functions in
every screen. On the 4424LD+ telephone, they are the Exit, Menu, 
,
and 
buttons
(see 4424LD+ Telephone). On the MLX-20L telephone, they
are the Home, Menu, More, and Inspct buttons (see MLX-20L
Telephone and DSS). The next five unlabeled buttons on each side are used
to select options from a menu displayed on the screen.
The red and green LEDs next to the 20 line and feature buttons assist the system programmer. These buttons are on or off during programming, depending on whether or not they have already been programmed.
Programming the system may also involve using the dialpad, some of the labeled function buttons on the lower portion of the console, or the 20 line and feature buttons in the center of the console. The overlay "renames" buttons for use during programming. The overlay (see 4424LD+ System Programming Console Overlay or MLX-20L System Programming Console Overlay) shows both pages of the numbers of line buttons when the telephone is in centralized telephone programming mode. It also shows the letters to which buttons correspond for programming Directories.
4424LD+ System Programming Console Overlay
MLX-20L System Programming Console Overlay
