LESSON 4
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1
A. Primary zone
The first two digits in the seven-digit telephone numbering system represent a
specific geographic area of operations of PR. (page 4-2, para 2b)
2
A. Switch designator
The second pair of digits (third and fourth digits) represent a particular location or
switch designator within a PR. (page 4-3, para 4)
3
C. CSPE
The theater CSPE makes the PR and SL assignments for each level of command.
(page 4-2, para 2a)
4
A. True
Normally a Theater Army or a corps will probably only use one PR. (page 4-2, para
2b)
5
A. True
To place a call from one automatic switch to another or to a manual switchboard, the
entire seven-digit number must be dialed. (page 4-3, para 6)
6
A. The last three digits
If the call is to a local subscriber connected to the same automatic switchboard, only
the last three digits need to be dialed. (page 4-3, para 6)
7
A. True
The theater commander through the CSPE can also determine adjacent PRs
permitting the planning of communication systems before the advance of friendly
forces. (page 4-2, para 2b)
SS 0029
4-8
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