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Cisco 642-427 Exam Overview:

Certification Vendor:Cisco
Exam Name:Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0)
Exam Number:642-427
Real Exam Qty:55-65
Exam Price:USD 300
Exam Format:Multiple-choice, Multiple-answer, Simulation-based
Certificate Validity Period:3 years
Available Languages:English, Japanese
Exam Duration:90 minutes
Related Certifications:CCNP Voice
Sample Questions:Cisco 642-427 Sample Questions
Exam Way:Proctored exam delivered at Pearson VUE testing centers.
Pre Condition:Valid CCNA Voice or any active CCIE certification was required for the CCNP Voice certification path.
Official Syllabus URL:https://learningnetwork.cisco.com/s/exam-topics

Cisco 642-427 Exam Syllabus Topics:

SectionObjectives
Cisco Unified Communications Manager- Device registration problems
- Call processing issues
- Dial plan troubleshooting
Voice Gateways and Trunks- PSTN connectivity issues
- MGCP gateway troubleshooting
- SIP trunk troubleshooting
- H.323 gateway troubleshooting
IP Phones and Endpoints- Firmware and endpoint connectivity issues
- Phone registration and provisioning
Quality of Service and Voice Quality- Voice quality diagnostics
- Latency, jitter, and packet loss analysis
- QoS verification and troubleshooting
Media Resources- Music on Hold and annunciators
- Media Termination Points
- Transcoders and conference bridges
Cisco Unity and Voice Applications- Messaging service troubleshooting
- Voicemail integration issues
Troubleshooting Methodology- Structured troubleshooting process
- Diagnostic tools and techniques
- Log and trace analysis
Cisco Unified Presence and Mobility- Presence service troubleshooting
- Mobility and extension mobility issues

Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Sample Questions:

1. Refer to the exhibit.

Refer to the exhibit. All phones are placed in the Internal_Pt partition. The CSS for all phones contains the partition Internal_Pt, and Vml.CSS contains the voice-mail hunt pilot. When a call is placed from extension 2001 to 2002, which statement is true?

A) Extension 2002 will ring.
B) The call will be blocked.
C) Extension 2002 will ring, and if the call is not answered, the call will match the translation pattern and then be forwarded to voice mail
D) Extension 2002 will ring, and if the call is not answered, the call will match the translation pattern and then be blocked.
E) The call will be answered by voice mail.


2. HOTSPOT


3. Users are complaining that they hear echo when they place calls to the PSTN through the HQ_PSTN gateway. The voice port configuration for the gateway is as follows:
voice-port 1/0:23
input gain -1
output attenuation 1
echo-cancel erl worst-case 3
Why are users hearing echo?
Select the best response.

A) The echo canceller should be configured so that SIN and SOUT have a 2 dB difference in order to function properly.
B) InSignalLevel needs to be adjusted so that it is within the range from -20 dB to -25 dB
C) The actual ERL is 2dB; however, the echo canceller still does not acknowledge the input signal as echo because it is lower than the echo-cancel erl worst-case 3 command.
D) The echo canceller is functioning properly and some echo is to be expected on every call.


4. You have been advised by a TAC engineer to update the firmware of your Cisco IP Phones in your Cisco Unified Communications Manager cluster. You must update just one test phone initially in production to test the new firmware before you update the other production phones.
Which action allows this process without any down time to the other production phones?

A) Initialize a separate Cisco Unified Communications Manager Express device and use the built-in TFTP server to update the test phone with the same firmware on the Cisco Unified CM cluster.
B) Modify the DHCP server to make a new scope that includes only the new test phone.
C) Initialize a TFTP server outside the Cisco Unified CM cluster to replicate the new firmware from the Cisco Unified CM cluster to the test phone.
D) Install the new firmware in the TFTP server, keep the current load in the device defaults, and modify the phone load name in the phone configuration to use the recommended firmware version.


5. Users can log in to Cisco Extension Mobility, but they cannot log out.
Which action solves this problem?

A) Apply the Cisco Unified Communications Manager Extension Mobility service to the IP phones that have trouble logging out.
B) Change or remove the Calling Search Space on the phones that have trouble logging out of Cisco Unified Communications Manager Extension Mobility.
C) Create a new Cisco Unified Communications Manager Extension Mobility service.
D) Subscribe the device profile to Cisco Unified Communications Manager Extension Mobility.


Solutions:

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

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