Appendix A. Answers to Chapter Review Questions

Chapter 1

1.

What are the names of the two wires used by a traditional home phone to carry voice traffic and signaling information? (Select two.)

  1. Ground

  2. Tip

  3. Magneto

  4. Ring

2.

Who invented the first direct-dial telephone switch?

  1. Thomas Watson

  2. Almond Brown Strowger

  3. Alexander Graham Bell

  4. Harry Nyquist

3.

Which type of telephone switch is most appropriate for a business needing to support 10,000 phones?

  1. CO switch

  2. Key system

  3. PBX

  4. Ethernet switch

4.

Identify three types of signaling used on PSTN networks.

  1. Information

  2. Address

  3. Fallback

  4. Supervisory

5.

How many voice channels can be carried over a T1 circuit in a traditional PSTN/PBX environment?

  1. 16

  2. 24

  3. 30

  4. 64

6.

“Dial tone” is an example of which type of signaling?

  1. Information

  2. Address

  3. Fallback ...

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