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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Signaling and Call Control | - Dial plans and call routing - SIP, H.323, and MGCP protocols - Gateways and gatekeepers |
| Topic 2: Troubleshooting and Operations | - Common VoIP deployment issues - Voice and QoS troubleshooting methodologies |
| Topic 3: VoIP Fundamentals | - Voice codecs and compression techniques - Voice over IP architecture and components - Voice traffic signaling basics |
| Topic 4: Call Admission Control and Performance | - Voice network performance considerations - Call admission control mechanisms |
| Topic 5: Quality of Service (QoS) | - Traffic classification and marking - QoS models and mechanisms - Congestion management and avoidance - Queuing techniques and bandwidth management |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
In which situation would an administrator configure telephony services, but not configure any individual ephones?
- A. Remotely located phones that are controlled by a third-party PBX
- B. This is not a valid scenario. Ephones are always required.
- C. Cisco Unified Communications Manager Express with HSRP
- D. Cisco Unified Communications Manager SRST fallback
- E. Phones that are controlled by Cisco Unified Communications Manager Express
Correct Answer: D 🗳️
Explanation: Only visible for VCEDumps members. You can sign-up / login (it's free).
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 PC port and the LAN port on the IP phone
- B. between the IP phone and the switch
- C. between the IP phone and the PC
- D. between the access layer switch and the distribution layer switch
Correct Answer: B 🗳️
Which type of voice port supports Dialed Number Identification Service signaling for outbound calls, and inbound calls carry only ANI?
- A. E&M
- B. FXO
- C. FXS-DID
- D. FXS
Correct Answer: B 🗳️
Which process does a voice gateway use to determine how to route an outbound call?
- A. The voice gateway uses the called number to match the destination pattern of outbound dial peers using the first-match rule.
- B. The voice gateway uses the calling number to match the destination pattern of the outbound dial peers using the longest-match rule.
- C. The voice gateway uses the longest-match rule to match the called number to the destination pattern to the outbound POTS or VoIP dial peers.
- D. The voice gateway uses the first-match rule to match the calling number to the destination pattern of the outbound POTS and VoIP dial peers.
Correct Answer: C 🗳️
Refer to the exhibit.
Cisco 642-437 Exam
An administrator is migrating a PBX telephony system to a VoIP solution using a fixed numbering plan. The extension numbers and PSTN DIDs cannot be changed. Which of the following methods can be used in order to reach the individual extensions at Site B when called via the PSTN?
- A. The administrator can replace the last three digits of the DID with xxx to cover the individual extensions.
- B. The administrator needs to implement an auto-attendant solution where individual extensions can be dialed.
- C. The administrator needs to map the last four digits in the DID to the extension numbers using translation rules.
- D. The administrator can replace the last three digits of the DID with xxx and use translation rules to map the individual extensions.
Correct Answer: C 🗳️
