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CHAPTER 1
INTRODUCTION TO SOUND-POWERED
TELEPHONES
LEARNING OBJECTIVES
Learning objectives are stated at the beginning of each
chapter. These learning objectives serve as a preview of
the information you are expected to learn in the chapter.
By successfully completing the nonresident training
course (NRTC) for this training manual (TRAMAN), you
indicate you have met the objectives and have learned
the information.
Upon completing this chapter, you should be able to do the
following:
l Explain the fundamentals of sound-powered telephone
communications.
l Apply the phonetic alphabet and the Navy’s standard
pronunciation of numerals.
OPERATION OF SOUND-POWERED TELEPHONES
Sound-powered telephones are just what the name implies.
They are telephones powered by the sound pressure of your voice
rather than batteries or an electrical power source.
If your
phones work properly, speaking in a strong, clear voice generates
enough current to carry your voice to all other phones on the
circuit.
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