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

642-437

Exam Code: 642-437

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

Updated: May 29, 2026

Q&A Number: 257 Q&As

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

1. 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 fail because the destination patterns are identical.
B) The calls will always take the IP WAN route.
C) The calls will use round-robin scheduling between the IP WAN and PSTN paths.
D) The calls will always take the PSTN route.
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.


2. What are the three acceptable values for one-way delay, jitter, and packet loss in a VoIP network? (Choose three.)

A) 0-400 ms for delay
B) 30 ms for jitter
C) 1 packet loss
D) 1 percent packet loss
E) 0-150 ms for delay
F) 20 ms for jitter


3. What is the delta in the total end-to-end delay values of two voice packets in the voice flow?

A) packet loss
B) variable network delay
C) variation of delay
D) end-to-end delay
E) bandwidth capacity


4. DRAG DROP
Drag the signaling streams to support SIP Early Offer from the left and drop them in the correct box in the graphic on the right.


5. Which three functions are associated with MGCP? (Choose three.)

A) MGCP uses a separate channel for backhauling signaling information between the call agent and the gateway.
B) A call agent uses control messages to direct its gateways and their operational behavior.
C) Control is implemented by a series of plain-text commands that are sent over UDP port 2427 between Cisco Unified Communications Manager and the gateway.
D) The gateway maintains a separate dial plan for redundancy in case the call agent fails.
E) A PRI backhaul channel forwards PRI Layer 2 (Q.921) signaling information via a TCP connection from the gateway to the call agent.
F) Users query the call agent to determine the location of the call recipient.


Solutions:

Question # 1
Answer: C
Question # 2
Answer: A,B,D
Question # 3
Answer: C
Question # 4
Answer: Only visible for members
Question # 5
Answer: A,B,C

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300-115J - Implementing Cisco IP Switched Networks (300-115日本語版)
300-101 - Implementing Cisco IP Routing
642-832J - Troubleshooting and Maintaining Cisco IP Switched Networks (TSHOOT) (642-832日本語版)
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