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Cisco 642-432 Exam Syllabus Topics:

Cisco Voice Over IP Sample Questions:

1. You are working with a potential customer that would like to integrate its existing PBX telephone system into its IP network. The accompanying figure shows that the customer has two offices that need to be connected to the IP network so that the customer can exchange telephone calls without using the PSTN. Both PBXs use an in-band signaling type.
Which signaling type will allow you to support your customer?

A) E&M
B) T-CCS
C) QSIG
D) CAS
E) FXO
F) CCS

2. Which statement is true about only out-of-band signaling?

A) All voice packets carry their own signaling.
B) Signaling bits are sent in a special order in a dedicated signaling frame.
C) A signaling bit is robbed from each frame.
D) All signaling is directly associated with its corresponding voice frame.

3. Refer to the exhibit. Will these delays meet the G.114 recommendation for one-way delay?

A) Yes, they will meet the recommendation, provided the administrators understand the implications.
B) Yes, they will meet the recommendation for most user applications.
C) No, but they will be acceptable for time-sensitive transaction processing.
D) No, they will not meet the recommendation for general network purposes.

4. In the connection between a Cisco router and an E&M port on a PBX, which side is generally the Cisco side?

A) signaling unit
B) loop start
C) switch port
D) trunk circuit

5. You have been forwarded some questions by a prospective VoIP customer who would like to know the Cisco default sample size for the G.729 codec. What is it?

A) 20 ms
B) 40 ms
C) 30 ms
D) 10 ms

Solutions: