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Cisco Voice Over IP Sample Questions:

1. You are meeting with a customer that has deployed IP telephony at their headquarters
location. They would like to roll out IP telephony to their regional office as well. They are now using the G.711 codec at headquarters. They want to be able to maximize the number of calls carried without impacting voice quality or forcing a WAN upgrade. Which codec would be appropriate for their WAN?

A) G.729B
B) G.723.1
C) G.711
D) G.726

2. Which problem does a-law and mu-law address?

A) encoding loses signal integrity at lower frequencies
B) quantization produces higher signal-to-noise ratios at smaller amplitudes
C) encoding produces greater signal loss at higher amplitude
D) quantization produces distortion at higher frequencies

3. Which command parameter specifies that the router should not attempt to initiate a trunk connection but should wait for an incoming call before establishing the trunk?

A) connection-trunk 404555 answer-mode
B) ds0-group timeslots 1-23 type ext-sig
C) codec clear-channel
D) voice-port 1/0:1

4. DRAG DROP
Drop

5. King's Mountain Cable has a pair of voice enabled routers capable of supporting only high complexity codecs. They need to conserve bandwidth on WAN links without major impact to call quality. Which two codecs satisfy these requirements? (Choose two.)

A) G.729b
B) G.729
C) G.729ab
D) G.729a

Solutions: