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: Sep 15, 2026
  • Q & A: 257 Questions and Answers

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Cisco 642-437 Exam Syllabus Topics:

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

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

Question #1

Which component in the Media Gateway Control Protocol environment is responsible for controlling the operation of the gateways?

  • A. call agent
  • B. gate master
  • C. calling authority
  • D. gatekeeper
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #2

Which command should you use to configure a dial-peer to support T.38 fax relay and to use Cisco fax relay if T.38 fails?

  • A. fax protocol t38 fallback cisco
  • B. fax relay t38 cisco
  • C. fax relay t38 backup cisco relay
  • D. fax t38 fallback cisco
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #3

Which of the available quality of service models offers the greatest amount of scalability while maintaining service quality?

  • A. Diffserv
  • B. PriServ
  • C. Best Effort
  • D. IntServ
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #4

Which of the following best describes the implementation challenges that are associated with variable-length numbering plans?

  • A. the degree in which the dial plan varies
  • B. the mapping between IP addresses and extension numbers
  • C. the identification of the number of digits that need to be dialed before the call is routed
  • D. the number of trunks that need to be assigned
  • E. the variable number of extensions that need to be implemented
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #5

In the destination patterns, which wildcard symbol indicates a single-digit placeholder?

  • A. . (period)
  • B. ()
  • C. %
  • D. +
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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