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Cisco 642-437 exam : Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)

642-437 Exam Simulator
  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: Oct 25, 2026
  • Q & A: 257 Questions and Answers
  • Cisco 642-437 Q&A - in .pdf

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Cisco 642-437 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Describe a Dial Plan13%- Dial plan components and functions
- Digit manipulation and route patterns
- Call routing and PSTN connectivity
Topic 2: Implement Cisco Unified Communications Manager Express18%- IP phone registration and provisioning
- CUCME setup and configuration
- Basic call features and dial plans
Topic 3: Implement Voice Gateways22%- Fax and modem support
- Analog and digital voice ports
- Dial peers configuration
- Gateway types and deployment models
Topic 4: Implement Gatekeeper and Cisco Unified Border Element12%- Interoperability and security
- CUBE deployment and features
- Gatekeeper functions and configuration
Topic 5: Describe VoIP Call Legs and Signaling20%- H.323, SIP, and MGCP protocols
- VoIP architecture and call flow
- Codec selection and media transport
Topic 6: Implement QoS for Voice Networks15%- Call Admission Control
- Classification, marking, and policing
- QoS principles and requirements
- Queuing mechanisms and AutoQoS

Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:

Question #1

DRAG DROP
Drag the components from the left and drop them under the appropriate categories on the right.

Cisco 642-437 Exam

Reveal Solution  Discussion  0

Correct Answer:


Explanation:
DSP delay, Packetization delay, Serialization delay & Dejitter Buffer delay are Fixed delay types. Queuing and Buffering delay & Network delay are Variable Delay types.
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_white_paper09186a00800a8993.shtml
Fixed Delay DSP Delay Serialization Delay Dejitter Buffer Delay Processing Delay
Variable Delay Network Delay Queuing Delay

Question #2

DRAG DROP
Drag the appropriate IOS commands from the left and drop them in the spaces on the right to create a dial peer that will match all inbound calls and prevent two-stage dialing on a T1 PRI circuit. Not all boxes are used and not all options are used.

Reveal Solution  Discussion  0

Correct Answer:


Explanation:
Cisco 642-437 Exam
In the case of Digital Interfaces, when the PBX or central office (CO) switch sends a setup message that contains all the digits necessary to fully route the call, those digits can be mapped to an outbound Voice over IP (VoIP) dial-peer (or hairpin to plain old telephone service (POTS) dial-peer directly). The router/gateway does not present a secondary dial tone to the caller and does not collect digits. It forwards the call directly to the configured destination. In the case of analog interfaces, the user only hears the dial tone once (either local or remote), and then dials the digits and gets through to the destination phone. This is called one stage dialing. When one receives an inbound call from a POTS interface, the Direct Inward Dial (DID) feature in dial-peers enables the router/gateway to use the called number (dialed number identification service (DNIS)) to directly match an outbound dial-peer. When DID is configured on the inbound POTS dial-peer, the called number is automatically used to match the destination pattern for the outbound call leg. The incoming called number command will match the dial-peer that has the DID configured.
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a00800e00d0.shtml

Question #3

Which two statements are true regarding SCCP? (Choose two.)

  • A. Endpoints and gateways maintain the dial plan.
  • B. SCCP may interoperate with H.323 endpoints if it is implemented with Cisco Unified Communications Manager.
  • C. SCCP uses hex messages for communication.
  • D. Endpoints can operate autonomously if communication with Cisco Unified Communications Manager is lost.
  • E. SCCP requires each endpoint or gateway event to be communicated to Cisco Unified Communications Manager.
Reveal Solution  Discussion  0

Correct Answer: B,E  🗳️

Explanation: Only visible for ITExamSimulator members. You can sign-up / login (it's free).

Question #4

When marking traffic for Expedited Forwarding, how does a device that is not capable of recognizing DSCP interpret the EF binary string 101110?

  • A. The devices in the network that do not recognize DSCP will use the three high-order DSCP bits as the CoS setting, resulting in a CoS value of 5.
  • B. The device that does not recognize DSCP will use 110 as the CoS value and forward the packet with a CoS of 6.
  • C. The first device in the network that does not recognize DSCP will use 110 as the CoS value and will replace the DSCP value with a CoS of 6 and forward the packet.
  • D. The device that cannot recognize DSCP will use best effort to forward the packet.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #5

Which three methodologies are specific types of QoS used on a 512-kb/s point-to-point IP WAN link? (Choose three.)

  • A. RSVP
  • B. LLQ
  • C. FRF.12
  • D. Multilink PPP
  • E. header compression
Reveal Solution  Discussion  0

Correct Answer: B,C,E  🗳️

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