Cisco Voice Over IP : 642-432

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Cisco Voice Over IP Sample Questions:

1. How do a-law and mu-law handle issues with signal-to-noise ratios related to the measure of amplitude?

A) Use smaller step functions at lower amplitudes.
B) Use smaller step functions at higher frequencies.
C) Increase code points at lower amplitudes.
D) Increase code points at higher frequencies.

2. Which is the best way to achieve a scalable dial plan?

A) variable number of extension digits
B) hunt groups
C) group numbers for a particular area
D) single number prefixing

3. LAB

Examine the following PBX system parameters:
The calling side seizes the line by going off-hook on its E-lead and sends information as DTMF digits.
The voice path is 4-wires, and the voice enabled router is in another building from the PBX.
Select the correct set of commands to allow communication between a voice enabled router and a PBX.

A) voice port 1/0/0 signal immediate-start operation 4-wire type 4
B) voice port 1/0/0 signal wink-start operation 4-wire type 3
C) voice port 1/0/0 signal immediate-start operation 4-wire type 2
D) voice-port 1/0/0 signal delay-dial operation 4-wire type 1

4. Which type of delay is caused when large data packets block voice packets from the outbound interface?

A) queuing delay
B) packetization delay
C) propagation delay
D) serialization delay

5. Your customer has forwarded this diagram and configuration. The customer wishes to have a connection between its PBXs, a connection that is created and dropped as required. There is one configuration statement missing from each router. What are the two missing statements? (Choose two.)

A) connection trunk 2015551000404555?
B) connection tie-line 404555?
C) connection trunk
D) connection trunk 4045551200
E) connection tie-line 4045551200
F) connection tie-line 2015551000

Solutions: