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."
What are the three different types of local-loop signaling?
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
Which method is used to reduce echo on Cisco devices?
echo return loss
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
Which voice coding technique is used with G.711 CODECs?
Which two G.729 CODECs provide built-in IETF VAD and CNG?
How many time slots are there in an E1 frame using CAS?
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
At what speed does the fax modem operate in a Cisco fax relay environment?
Which protocol is used to carry modem signals across a VoIP network when using modem relay?