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

  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: May 26, 2026
  • Q & A: 257 Questions and Answers

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

1. Which types of voice ports allow a small office to provide outbound DNIS and inbound DID?

A) FXO and E&M
B) FXS and FXO
C) FXS and E&M
D) FXS and FXS-DID
E) FXS-DID and FXO


2. In which situation would an administrator configure telephony services, but not configure any individual ephones?

A) This is not a valid scenario. Ephones are always required.
B) Cisco Unified Communications Manager Express with HSRP
C) Remotely located phones that are controlled by a third-party PBX
D) Phones that are controlled by Cisco Unified Communications Manager Express
E) Cisco Unified Communications Manager SRST fallback


3. Digital signal processors offload media processing functions from voice processing equipment. What is the function of the dsp services dspfarm command that is issued under the voice-card configuration mode?

A) Enables profile failed due to insufficient transcoding resources.
B) Takes the DSP resources that are not being used for the voice part and assigns them to a farm.
C) Provides resources for Flex-DSPRM status UP.
D) Permits the codec rate to be attempted for SCCP-controlled connections.


4. What is the default encryption algorithm that is used by SRTP?

A) Blowfish
B) DES
C) RC4
D) AES


5. A small company would like to minimize the number of analog lines that they use to connect to the PSTN. They are considering a single FXO circuit. Which issue will they encounter if they deploy this solution?

A) They will need an additional FXS-DID circuit to support inbound ANI.
B) They will be able to support both inbound and outbound calls without any issues.
C) They will need an FXS port for inbound calls to carry ANI.
D) They won't be able to support DID and will require a mechanism to handle inbound calls, like PLAR to an operator line.


Solutions:

Question # 1
Answer: E
Question # 2
Answer: E
Question # 3
Answer: B
Question # 4
Answer: D
Question # 5
Answer: D

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