AT&T MERLIN LEGEND System Reference Manual page 51

Features
How the Information Is Presented
2-2 Introduction
System, telephone, and system operator features are combined in this chapter
and presented in alphabetical order. The information for each feature is
presented under the following subheadings:
Extension Programming - the programming codes, feature codes, and
digital/lSDN (MLX) telephone display labels that appear on the MLX
telephone display while the feature is being programmed or used
Description - how the feature works and what it does for the user
Telephone Differences - differences in feature operation among telephone
types
Mode Differences - functional differences of the feature in the Key,
Hybrid/PBX, or Behind Switch modes of operation
Considerations - restrictions, capacities, and other information to consider
before using or programming the feature
Feature Interaction — other features that must be used with, cannot work
with, or modify the operation of the described feature
System Programming — the steps to activate the feature and the menu
choices to reach the right screen from the System Programming menu. (See
the Planning Guide [PBX or Key] for planning instructions and System
Programming for system programming instructions.)
Hardware Requirements — hardware required to use features, including
connectivity diagrams where applicable
Related Features — other features with similar functionality
Note: Subheadings that are not applicable are omitted-for example, if there
are no mode differences, the "Mode Differences" subheading is omitted.