Cisco 642-432 Actual Free Exam Questions & Community Discussion

  • Exam Code/Number: 642-432
  • Exam Name/Title: Cisco Voice Over IP
  • Certification Provider: Cisco
  • Corresponding Certification: CCVP
  • Exam Questions: 72
  • Updated On: May 28, 2026
In the connection between a Cisco router and an E&M port on a PBX, which side is generally the Cisco side?
Correct Answer: B Vote an answer
Which statement is true about only out-of-band signaling?
Correct Answer: A Vote an answer
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.)
Correct Answer: A,D Vote an answer
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?
Correct Answer: D Vote an answer
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 Wink-Start signaling.
Which signaling type will allow you to support the customer?
Correct Answer: D Vote an answer
Which problem does a-law and mu-law address?
Correct Answer: D Vote an answer
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?
Correct Answer: A Vote an answer
Refer to the exhibit.

Your customer wants to converge the existing PBX network with the IP network.
The three remote offices have various types of PBXs. The customer is using a combination of tie-lines and trunks to connect the PBXs today.
Which kind of connection should be implemented to allow calls to be placed from 201-5551000 to 727-555-1000 so that when the call is completed, network resources are returned for other uses?
Correct Answer: B Vote an answer
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