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Updated: Aug 09, 2026
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Cisco 642-437 Exam Overview:
| Certification Vendor: | Cisco |
| Exam Name: | Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) |
| Exam Number: | 642-437 |
| Exam Format: | Multiple Choice Single Answer, Multiple Choice Multiple Answer, Drag and Drop, Simulation |
| Exam Price: | USD 300 |
| Passing Score: | Not publicly disclosed / Approximately 750-800 out of 1000 |
| Real Exam Qty: | 60-70 |
| Related Certifications: | CCNA Voice CCIE Collaboration |
| Certificate Validity Period: | 3 years |
| Available Languages: | English, Japanese |
| Exam Duration: | 90 minutes |
| Recommended Training: | Implementing Cisco Unified Communications Voice over IP and QoS v8.0 |
| Exam Registration: | Pearson VUE Registration Cisco Exam Page |
| Sample Questions: | Cisco 642-437 Sample Questions |
| Exam Way: | Onsite at Pearson VUE test centers; no online proctoring available |
| Pre Condition: | Valid CCNA Voice certification or equivalent knowledge; CCIE certification also satisfies eligibility |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/642-437-cvoice.html |
Cisco 642-437 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Describe a Dial Plan | 13% | - Call routing and PSTN connectivity - Digit manipulation and route patterns - Dial plan components and functions |
| Topic 2: Implement Cisco Unified Communications Manager Express | 18% | - Basic call features and dial plans - IP phone registration and provisioning - CUCME setup and configuration |
| Topic 3: Implement QoS for Voice Networks | 15% | - Call Admission Control - Classification, marking, and policing - Queuing mechanisms and AutoQoS - QoS principles and requirements |
| Topic 4: Describe VoIP Call Legs and Signaling | 20% | - Codec selection and media transport - VoIP architecture and call flow - H.323, SIP, and MGCP protocols |
| Topic 5: Implement Voice Gateways | 22% | - Analog and digital voice ports - Fax and modem support - Dial peers configuration - Gateway types and deployment models |
| Topic 6: Implement Gatekeeper and Cisco Unified Border Element | 12% | - Gatekeeper functions and configuration - CUBE deployment and features - Interoperability and security |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
1. DRAG DROP
Drag the appropriate IOS commands from the left and drop them in the spaces on the right in order to configure the dial peers for the Cisco Unified Border Element. The IP WAN connection between the two Cisco Unified Border Elements uses SIP. Not all commands and spaces are used.
Cisco 642-437 Exam
2. Which Cisco Unified Border Element configuration supports H.323 protocol interworking and address hiding?
A) voice services h323 to h323 h323 interworking media flow-through
B) voice services h323 to h323 h323 interworking media flow-around
C) voice service voip all-connections h323 to r323
D) voice services voip allow-connections h323 to h323 media flow-around
3. Switch port fa0/2 has been configured to connect an IP phone with an attached PC. Given the set of commands in the example, where does the trust boundary lie?
interface fa0/2
mls qos trust cos mls qos trust device cisco-phone
switchport voice vlan 112
A) between the IP phone and the switch
B) between the access layer switch and the distribution layer switch
C) between the PC port and the LAN port on the IP phone
D) between the IP phone and the PC
4. DRAG DROP
Drag the statement from the left to the protocol name that is associated with it on the right.
5. What are two advantages of deploying dual VLANs on an access layer switch that connects to an IP phone? (Choose two.)
A) Implementing dual VLANs allows you to connect two devices that are in different VLANs to a single switch port.
B) It is typically used for IP phones that are not Cisco IP phones, IP softphones, or when Cisco IP phones or other Cisco voice devices (such as the Cisco VG248 Analog Phone Gateway) do not support PCs to be connected to them.
C) There are no advantages if a Cisco IP phone has a PC attached. Both the voice and data services should be in the same VLAN.
D) This is the default state when an IP phone is connected to an unconfigured Cisco Catalyst switch.
E) Dual VLANs allow for the logical separation of data and voice traffic, which allows the network to process these two traffic types individually.
Solutions:
| Question # 1 Answer: Only visible for members | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: Only visible for members | Question # 5 Answer: A,E |
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