AT&T MERLIN LEGEND Release 4.0 Feature Reference page 447

Feature Reference
Description
Programming allows you to customize and update your system and provides
telephone users and operators with a wide range of features. There are three
types of programming:
System programming
Centralized telephone programming
Extension programming
The tables in Appendix C provide complete lists of system operator and
telephone features, their programming codes, and the telephones on which the
features can be programmed. The tables also show which features can be
assigned only through centralized telephone programming.
System Programming
Initial system programming is done when the system is planned and installed.
The system can be reprogrammed as needs change.
Like centralized telephone programming, system programming can be done
either on the system programming console or using SPM software.
Brief descriptions of the pertinent programming paths can be found in the "At a
Glance" section.
Complete information about system programming can be found in System
Programming .
A chart showing the system programming hierarchy can be found in
Appendix E.
Programming with the MLX-20L Telephone
The MLX-20L telephone is the only telephone that can be used as a system
programming console (see Figure 36). The MLX-20L telephone must be
connected to the first extension jack on the first MLX module for initial
programming of a new system.
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.
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Programming