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Cisco 642-437 Exam : Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
- Exam Code: 642-437
- Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
- Updated: Oct 27, 2026
- Q & A: 257 Questions and Answers
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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Voice Gateways and Call Routing | - Gateway implementation and configuration
|
| Topic 2: VoIP Fundamentals | - Voice over IP basics
|
| Topic 3: Cisco Unified Border Element (CUBE) | - CUBE features and configuration
|
| Topic 4: Quality of Service (QoS) | - QoS mechanisms
|
| Topic 5: Cisco Unified Communications Manager Express | - CUCME configuration
|
| Topic 6: Troubleshooting | - Troubleshooting voice and QoS issues
|
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
Question #1
Refer to the exhibit.
When an inbound PSTN call from 4087071222 arrives at the ISDN port that is shown in the exhibit, which dial peer will be matched for the inbound leg?
- A. Dial-peer 2123, because answer-address takes precedence over incoming called-number.
- B. Dial-peer 123, because incoming called-number takes precedence over answer-address.
- C. Although dial-peer 123 takes precedence, there is no direct-inward-dial that is configured, therefore 2123 will be selected.
- D. Although dial-peer 123 takes precedence, there is no port that is configured under dial-peer 123, therefore dial-peer 2123 will be selected.
- E. The matching inbound dial peer will be selected at random.
Correct Answer: B 🗳️
Question #2
Which four Cisco IOS commands are required to configure a DHCP server on a voice gateway to support a voice subnet so that both IP addresses and the IP address of the TFTP server are provided? The voice subnet has an address of 10.1.130.0/24, the default gateway is 10.1.130.1/24, and the TFTP server is located at 10.1.5.2. (Choose four.)
- A. default-router 10.1.130.1
- B. default-gw 10.1.130.1
- C. dhcp pool voice
- D. ip dhcp pool voice
- E. option 150 10.1.5.2
- F. subnet 10.1.130.1/24
- G. option 150 ip 10.1.5.2
- H. network 10.1.130.0 255.255.255.0
Correct Answer: A,D,G,H 🗳️
Question #3
A small office needs to provide outbound dialing and inbound DID without the cost of a T1 circuit. All signaling is loop-start. Which analog port configuration will support these requirements?
- A. voice-port 0/0/0/ description fxs-did signal did loop-start ! voice-port 0/1/0 description fxo signal loop-start ! dial-peer voice 1 pots incoming called-number . direct-inward-dial port 0/0/0 ! dial-peer voice 90 pots destination-pattern 9T port 0/1/0
- B. voice-port 0/1/0 signal did loop-start ! dial-peer voice 1 pots incoming called-number . ! dial-peer voice 90 pot destination-pattern 9T port 0/1/0
- C. voice-port 0/0/0 signal did loop-start ! dial-peer voice 1 pots incoming called-number . direct-inward-dial ! dial-peer voice 90 pots destination-pattern 9T port 0/0/0
- D. voice-port 0/0/0 signal loop-start ! voice-port 0/1/0 signal loop-start ! dial-peer voice 1 pots incoming called-number T direct-inward-dial ! dial-peer voice 90 pots destination-pattern 9T port 0/1/0
Correct Answer: A 🗳️
Question #4
When you implement the tail-end hop-off path-selection strategy, which task should you complete first?
- A. Define the VoIP outbound digit manipulation.
- B. Define the outbound VoIP dial peer.
- C. Define the VoIP inbound digit manipulation.
- D. Define the inbound VoIP dial peer.
Correct Answer: A 🗳️
Question #5
Which statement about a dial peer is true?
- A. A dial peer is similar to static routes; it defines where calls originate and terminate and which path the calls take through the network.
- B. A dial peer describes the number and pattern of digits that a user dials to reach a particular phone number.
- C. A dial peer is used to control the number of digits that are stripped before the dialed string is passed to the telephony interface.
- D. A dial peer manipulates digits in a dial string before it passes the dial string to the telephone device.
Correct Answer: A 🗳️
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