LESSON 4
TELEPHONE DIRECTORY
Critical Task: 01-5710.07-0001
OVERVIEW
LESSON DESCRIPTION:
In this lesson, you will learn how to develop a telephone directory for a non-MSE unit.
TERMINAL LEARNING OBJECTIVE:
ACTION:
Describe a telephone directory of a non-MSE unit.
CONDITION:
Given this lesson material, paper, pencil, and no supervision.
STANDARD:
To demonstrate competency on this lesson, you must achieve a minimum of 70
percent on the subcourse examination.
INTRODUCTION
Throughout the first three lessons of this subcourse, you learned some of the tools necessary for
planning a tactical telephone system. You learned the different types of telephones and switchboards we
use now in the field. In Lesson 2, you learned the numbering system used today with the automatic
switches. Finally in Lesson 3, you learned the technique to determine the trunk group sizing. In Lesson
4, you will learn how to prepare a telephone directory.
The effectiveness of automatic switching within a tactical signal system depends on planning,
engineering, and control. Even if all facilities are available, the switch will not function efficiently
unless properly programmed to accept and complete the calls. Therefore the switch must be able to
identify all the users in the network. To assist the switch and the users, the tactical automatic switch
network uses a tactical numbering plan. In Lesson 2, we examined the different numbering systems
used by the automatic switchboards. In this lesson, we will concentrate on the tactical numbering plan.
The principles used in creating your tactical telephone directory can be applied for a fixed or a strategic
numbering plan.
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SS 0029
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