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: Jun 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 type of North American Numbering Plan number code is used to designate a number for special purposes?

A) carrier identification codes
B) service codes
C) Automatic Number Identification II digits
D) easily recognizable codes


2. Refer to the exhibit.

Cisco 642-437 Exam
What happens when users at Site B place calls to Site A when the IP WAN is operational?

A) The calls will use round-robin scheduling between the IP WAN and PSTN paths.
B) The calls will always take the IP WAN route.
C) The calls will always take the PSTN route.
D) The calls will fail because the destination patterns are identical.
E) The calls will use the IP WAN route unless there is a failure or congestion during which the calls will reroute via the PSTN.


3. The router with the IP address of 10.1.120.1 needs to be configured to use the device 10.1.140.1 as the clock source. Which configuration command will accomplish this task?

A) ntp client 10.1.120.1 server 10.1.140.1
B) clock source 10.1.140.1
C) ntp source ip addr 10.1.140.1
D) clock set 10.1.140.1
E) ntp server 10.1.140.1


4. Refer to the exhibit.

Consider an outgoing call that is being placed in all three scenarios that are shown in the exhibit. What is the result of the call, going down the table from top to bottom?

A) success, fail, success
B) success, fail, fail
C) fail, success, fail
D) success, success, fail
E) fail, success, success
F) success, success, success


5. Refer to the exhibit.

Callers dial 0 to reach an outside line. When they try to place calls to directory services (322) or services (422), they hear the reorder tone. What needs to be edited in the dial peer to allow these calls to complete successfully?

A) A "prefix 1" statement needs to be added to the dial-peer configuration.
B) The destination pattern is incorrect. It needs to start with a 9.
C) The destination pattern needs to be edited so that the first digit that is matched is a 0 and the forward-digits all command needs to be added to the dial peer.
D) The destination pattern needs to be edited so that the first digit that is matched is a 0.
E) The destination pattern needs to be edited so that the first digit that is matched is a 1 and the forward-digits all command needs to be added to the dial peer.
F) The forward-digits all command needs to be applied to the dial peer.
G) The destination pattern needs to be edited so that the first digit that is matched is a 0 and the forward-digits 3 command needs to be added to the dial peer.


Solutions:

Question # 1
Answer: D
Question # 2
Answer: A
Question # 3
Answer: E
Question # 4
Answer: F
Question # 5
Answer: G

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