Instruction manual

FEATURES AND SERVICES
FEATURES AND SERVICES
Introduction
This section describes the System Features, Station Features, Network Features, Data
Features, and Attendant Features of AT&T System 25. It also covers certain services that
support and implement the features; included in this category are the digital tape unit, the
dial plan, system administration, and system maintenance. A general discussion of data
topics is also provided.
The feature descriptions are arranged in alphabetical order, regardless of the feature group
to which they belong.
Information for each feature is presented under one or more of the
following five subheadings:
Description,
Considerations, Interactions, Administration
Requirements, and Hardware Requirements.
Headings that are not applicable are omitted.
● Description
Defines the feature, describes what it does for the user, and how it is used.
● Considerations
Discusses the applications and benefits of the feature, followed by feature
parameters and factors to be considered when the feature is used.
● Interactions
Lists and briefly describes other features that can affect the feature being described.
Interacting features are those that:
— Depend on each other—One of the features must be provided if the other
one is.
— Cannot coexist—One of the features cannot be provided if the other one is.
— Affect each other—The operation of one feature modifies, or is modified by,
the operation of the other.
— Enhance each other—The features, in combination, provide improved service
to the user.
● Administration Requirements
States whether or not administration is required and lists items requiring
administration.
● Hardware Requirements
Lists any additional hardware needed to use the feature.
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