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Cisco 642-427 Exam Syllabus Topics:
| Section | Objectives |
| Topic 1: IP Phones and Endpoints | - Phone registration and provisioning
- Firmware and endpoint connectivity issues
|
| Topic 2: Quality of Service and Voice Quality | - QoS verification and troubleshooting
- Latency, jitter, and packet loss analysis
- Voice quality diagnostics
|
| Topic 3: Cisco Unity and Voice Applications | - Voicemail integration issues
- Messaging service troubleshooting
|
| Topic 4: Troubleshooting Methodology | - Log and trace analysis
- Structured troubleshooting process
- Diagnostic tools and techniques
|
| Topic 5: Media Resources | - Media Termination Points
- Transcoders and conference bridges
- Music on Hold and annunciators
|
| Topic 6: Voice Gateways and Trunks | - H.323 gateway troubleshooting
- MGCP gateway troubleshooting
- PSTN connectivity issues
- SIP trunk troubleshooting
|
| Topic 7: Cisco Unified Presence and Mobility | - Mobility and extension mobility issues
- Presence service troubleshooting
|
| Topic 8: Cisco Unified Communications Manager | - Call processing issues
- Dial plan troubleshooting
- Device registration problems
|
Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Sample Questions:
1. Refer to the exhibit.

Which configuration is the correct Cisco IOS configuration that corresponds to the Cisco SAF Forwarder that is shown in the exhibit?


A) Exhibit A
B) Exhibit B
C) Exhibit C
D) Exhibit D
2. In a Cisco UCM single-site deployment, please choose the maximum number of IP phones that can register with a UCM cluster.
A) 30,000
B) 10,000
C) 7500
D) 2500
3. Which two of the following items are the gateway supplementary services? (Select two.)
A) Transfer
B) Hold
C) DTMF relay
D) Transcoding
4. Refer to the exhibit.

Local 10-digit dialing in the North American Numbering Plan to area code 456 is failing.
Which two changes are needed to enable 10-digit dialing? (Choose two.)
A) Change dial peer 210 to destination-pattern 456.......
B) Change dial peer 210 to port 0/0/0:23.
C) Remove the command prefix 456 from dial peer 210.
D) Change dial peer 210 to destination-pattern 9456.......
5. You are trying to access the GUI of Cisco Unified Communications Manager. However, it displays a "not accessible" error. In Cisco Unified Serviceability, which two services should you check for and ensure are running on the Control Center - Network Services page? (Choose two.)
A) Cisco CallManager
B) System Application Agent
C) Cisco Trust Verification Service
D) Cisco Certificate Expiry Monitor
E) Cisco Tomcat
F) Cisco Tomcat Stats Servlet
Solutions:
Question # 1 Answer: A | Question # 2 Answer: A | Question # 3 Answer: A,B | Question # 4 Answer: B,D | Question # 5 Answer: A,E |