Chapter Review Questions


The following questions test your knowledge of topics explained in this chapter. You can find the answers to the questions in Appendix A, "Answers to Chapter Review Questions."

1.

What are the three different types of local-loop signaling?

  1. address signaling

  2. coding signaling

  3. control signaling

  4. informational signaling

  5. remote signaling

  6. supervisory signaling

2.

What is the normal ring cadence in the United States?

  1. one 2-second ring followed by 2 seconds of silence

  2. one 2-second ring followed by 4 seconds of silence

  3. two 0.4-second rings separated by 0.2 seconds of silence, followed by 2 seconds of silence

  4. two 2-second rings separated by 4 seconds of silence

3.

Which method is used to reduce echo on Cisco devices?

  1. echo suppression

  2. echo cancellation

  3. echo correction

  4. echo return loss

4.

In telephone voice-channel service, how often is the analog-to-digital signal conversion sampling process repeated?

  1. 8000 times per call

  2. 8000 times per voice sample

  3. 8000 times per second

  4. 8000 times per minute

5.

Which voice coding technique is used with G.711 CODECs?

  1. ADPCM

  2. CS-ACELP

  3. LDCELP

  4. PCM

6.

Which two G.729 CODECs provide built-in IETF VAD and CNG?

  1. G.729

  2. G.729A

  3. G.729B

  4. G.729AB

7.

How many time slots are there in an E1 frame using CAS?

  1. 16

  2. 24

  3. 30

  4. 32

8.

How many B channels and D channels are implemented on a PRI T1?

  1. 1 B channel and 1 D channel

  2. 2 B channels and 1 D channel

  3. 23 B channels and 1 D channel

  4. 30 B channels and 1 D channel

9.

At what speed does the fax modem operate in a Cisco fax relay environment?

  1. 64 kbps

  2. 52 kbps

  3. 16 kbps

  4. 9.6 kbps

10.

Which protocol is used to carry modem signals across a VoIP network when using modem relay?

  1. SMTP

  2. SPRT

  3. MGCP

  4. RTP




Cisco Voice over IP Cvoice (c) Authorized Self-study Guide
Cisco Voice over IP (CVoice) (Authorized Self-Study Guide) (2nd Edition)
ISBN: 1587052628
EAN: 2147483647
Year: 2006
Pages: 111
Authors: Kevin Wallace

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