TACTICAL NUMBERING SYSTEM
Critical Task.: 01-5710.07-0001
In this lesson, you will learn the joint and Army tactical numbering system.
TERMINAL LEARNING OBJECTIVE:
Explain the tactical numbering system.
You will have this lesson material, paper, pencil, and no supervision.
To demonstrate competency on this lesson, you must achieve a minimum of 70
percent on the subcourse examination.
This lesson provides a discussion of the telephone numbering system as well as the several numbering
plans which may be found in tactical networks. Included are limitations due to the design constraints of
some of the tactical circuit switch/switchboard equipment still in use.
The AN/TTC-39/39A is extremely flexible in its ability to adapt to different numbering plans. The
AN/TTC-39 routes traffic based upon telephone numbers. To route the traffic systematically, it requires
the use of a numbering plan. Since there are several numbering plans in use, the system planner must be
familiar with those plans. The planner must know how to program the switch to route calls using those