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? address signaling coding signaling control signaling informational signaling remote signaling supervisory signaling
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| 2. | What is the normal ring cadence in the United States? one 2-second ring followed by 2 seconds of silence one 2-second ring followed by 4 seconds of silence two 0.4-second rings separated by 0.2 seconds of silence, followed by 2 seconds of silence two 2-second rings separated by 4 seconds of silence
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| 3. | Which method is used to reduce echo on Cisco devices? echo suppression echo cancellation echo correction echo return loss
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| 4. | In telephone voice-channel service, how often is the analog-to-digital signal conversion sampling process repeated? 8000 times per call 8000 times per voice sample 8000 times per second 8000 times per minute
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| 5. | Which voice coding technique is used with G.711 CODECs? ADPCM CS-ACELP LDCELP PCM
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| 6. | Which two G.729 CODECs provide built-in IETF VAD and CNG? G.729 G.729A G.729B G.729AB
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| 7. | How many time slots are there in an E1 frame using CAS? 16 24 30 32
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| 8. | How many B channels and D channels are implemented on a PRI T1? 1 B channel and 1 D channel 2 B channels and 1 D channel 23 B channels and 1 D channel 30 B channels and 1 D channel
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| 9. | At what speed does the fax modem operate in a Cisco fax relay environment? 64 kbps 52 kbps 16 kbps 9.6 kbps
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| 10. | Which protocol is used to carry modem signals across a VoIP network when using modem relay? SMTP SPRT MGCP RTP
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