CCVP Cisco Voice Over IP : 642-432 Exam
642-432 CVOICE
Cisco Voice Over IP Exam
Retired July 26, 2008
Exam Number: 642-432
Associated Certifications: CCVP, Cisco IP Communications Support Specialist, and Cisco Rich Media Communications Specialist
Duration: 75 minutes (55 – 65 questions)
Available Languages: English
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Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The Cisco Voice over IP 642-432 CVOICE exam is associated with the CCVP, Cisco IP Communication Support Specialist, and Cisco Rich Media Communications Specialist certifications. Candidates can prepare for this exam by taking the Cisco Voice Over IP (CVOICE) course. This exam assesses a candidate’s knowledge of how to implement and support data and voice integration solutions at the network-access level. Topics covered include basic IP Telephony operation, router configuration, support, troubleshooting, and integration with an existing PSTN network.
Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.
Describe the similarities and differences between PSTN and VoIP including call transport, call signalling and bandwidth requirements
Identify PSTN characteristics, transport
Explain TDM and statistical multiplexing as it relates to telephony
Identify VOIP characteristics, transport
Compare operation of PSTN call signalling to VoIP call signalling
Configure a router so that a basic IP Telephony call can be completed
Configure dial-peer settings for VoIP or POTs
Configure POTs ports (FXS and FXO)
Configure E&M
Explain default dial-peer
Explain matching inbound/outbound dial peers
Configure hunt groups
Explain digit collection, consumptions and manipulations
Configure gateway/gatekeeper
Configure call signalling
Troubleshoot a basic IP telephony configuration
Use show/debug commands to troubleshoot invalid dial-peer configurations
Use show/debug commands to troubleshoot invalid port configuration and operation
Use show/debug commands to troubleshoot invalid signalling configuration
Use show/debug commands to troubleshoot invalid hunt-group configurations
Use show/debug commands to troubleshoot invalid digit manipulation
Successfully integrate a basic IP telephony network into the existing PSTN network
Explain port requirements for connection to a PBX
Explain signalling requirements for connection to a PBX
Choose correct connection type between PBX and VoIP networks
Compare and contrast a traditional dial plan to a VoIP Dial Plan
Identify telephony infrastructure terms (ie. LEC, CLEC, RBOC, ILEC, IXC)
Converse with traditional TDM support personnel using their terminology
Identify TDM signaling
Identify port and line types
Identify addressing signalling
Describe the basic operation and components involved in a VoIP call
Explain RTP, RTCP, cRTP
Explain H323
Explain MGCP
Explain SIP
Explain E&M
Describe the process of analog to digital conversion
Describe the process of compounding and compressing
Explain the process of packetization (frames, codec types)
Choose the appropriate codec for a given situation
Explain the function/operation/purpose of call-legs
Explain voice quality considerations
Explain the purpose and value of QoS
Successfully connect a basic VoIP net to the PSTN
Choose the correct gateway connection to the PSTN
Determine proper signalling options
Describe digit manipulation
Explain E164 addressing
Exam Number/Code: 642-432
Exam Name:CCVP Cisco Voice Over IP
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“CCVP Cisco Voice Over IP”, also known as 642-432 exam, is a Cisco certification. With the complete collection of questions and answers, Actualtests has assembled to take you through 72 Q&As to your 642-432 Exam preparation. In the 642-432 exam resources, you will cover every field and category in CCVP helping to ready you for your successful Cisco Certification.
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Exam DetailsThe Cisco Voice over IP 642-432 CVOICE exam is associated with the CCVP, Cisco IP Communication Support Specialist, and Cisco Rich Media Communications Specialist certifications. Candidates can prepare for this exam by taking the Cisco Voice Over IP (CVOICE) course. This exam assesses a candidate’s knowledge of how to implement and support data and voice integration solutions at the network-access level. Topics covered include basic IP Telephony operation, router configuration, support, troubleshooting, and integration with an existing PSTN network.
QUESTION 11
How do a-law and mu-law reduce quantization error?
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.
Answer: A
QUESTION 12
You have a pair of voice enabled routers that have the capability of supporting only
medium complexity codecs. You need to conserve bandwidth on WAN links without
major impact to call quality.
Which codecs will satisfy these requirements? (Choose two)
A. G.729
B. G.729A
C. G.729B
D. G.729.AB
Answer: B, D
QUESTION 13
You are the network technician at Certkiller .com. Your newly appointed Certkiller
trainee wants to know whatdoes the connection tie-line command emulates.
What will your reply be?
A. A temporary connection to a PBX.
B. A permanent connection to a PBX.
C. A temporary connection to the PSTN.
D. A permanent connection to the PSTN.
642-432
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E. A permanent connection to the network.
Answer: A
QUESTION 14
What is the most important piece to implement if you are considering a VoIP
infrastructure?
A. QoS
B. Reinstallation of the PBX
C. A new Help Desk trained on Voice technologies
D. POTS installation documentation.
Answer: A
QUESTION 15
Currently, unlike traditional phone service, IP telephone service is relatively
unregulated by government.
A. True
B. False
Answer: A
QUESTION 16
You are the network engineer at Certkiller .com. Certkiller has its headquarters in
New York and branch offices in Delaware, Detroit and Denver. Certkiller has a
traditional time-division multiplexing (TDM) based network with automated call
distribution (ACD) private branch exchanges (PBX) and desktop systems. You want
to add an IP telephony solution to the Certkiller network.
What will enable server and agent-level IP telephony to coexist with the existing
network?
A. IPCC
B. XLD-t
C. PBX-R
D. CiscoWorks
E. Call Manager
Answer: A
QUESTION 17
Calls between IP and PBX users can use all of the features provided by each system,
and that subset is defined by the level of complexity of the voice interface between
the IP network and the PBX.
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A. Fake
B. True
Answer: A
QUESTION 18
Which will provide your IP Phones with an IP Address?
A. The technician, it has to be statically assigned.
B. Any DHCP server
C. The Cisco CallManager DHCP snap-in with CiscoWorks.
D. IP Phones do not need an IP address.
Answer: B
QUESTION 19
What explains how the Cisco IP SoftPhone uses the Cisco CallManager?
A. The IP SoftPhone does not work with the Cisco CallManager
B. Cisco IP SoftPhone uses the services of the Cisco CallManager to route calls through
an IP telephony network.
C. Any IP SoftPhone plugs directly into the CallManager IPSP jack for onsite support
D. The IP SoftPhone will use CallManager to reset all voicemail on the PBX.
Answer: B
QUESTION 20
Which organization approved the H.323 standard?
A. ITEF
B. IEEE
C. FEMA
D. Bell Atlantic
E. ITU
Answer: E
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