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Cisco 642-427 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshooting Methodology and Tools | 20% | - Systematic troubleshooting approach - Monitoring and diagnostic tools: RTMT, Serviceability, traces, logs, debugs |
| Topic 2: CUCM and Registration Troubleshooting | 25% | - Gateway and trunk registration (SIP, H.323, MGCP) - Endpoint and IP phone registration issues - CUCM service availability and database replication |
| Topic 3: Call Setup and Dial Plan Troubleshooting | 25% | - Intrasite, intersite, and off-net call failures - Dial plan, route patterns, partitions, CSS, translation rules - Globalized call routing and number transformation |
| Topic 4: Integrated Solution Troubleshooting | 10% | - Unity Connection integration issues - Presence and IM service troubleshooting |
| Topic 5: Advanced Features and Applications | 20% | - Media resources, voice quality, and QoS issues - Extension Mobility Cross Cluster - Call Control Discovery (CCD) and SAF |
Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Sample Questions:
Question 1
How an H.323 gatekeeper can assume which bandwidth that will be required by a G.729 call?
A. 8 kbps
B. 64 kbps
C. 16 kbps
D. 24 kbps
Question 2
As a network administrator, you should be familiar with various commands. Which command can be used to designate a source IP address for a voice gateway?
A. h323-gateway voip interface
B. h323-gateway voip bind srcaddr
C. h323-gateway voip h323-id
D. voice service
Question 3
What do you do next if after observing the result of your troubleshooting, the problem still exists?
A. Consider the Possibilities
B. Restart Problem-Solving
C. Process Problem Resolved
D. Define the Problem
E. Gather Facts
F. Implement Acton Plan
G. Create Action Plan
H. Observe Results
Question 4
Look at the following exhibit carefully.
You can click the Voice Gateway for the BR2 location to see the output from the debug voice ccapi inout command and click on 10.1.5.10 to see and search the trace file output. You can also enter a string in the Search box and click the Find button to search the output. X can be clicked to back to the item.
As a network technician, you have recently configured a trunk between the Cisco Unified CallManager cluster at 10.1.5.10 and a CME at a 10.3.130.1. In the testing of this configuration, you discover that you can complete calls when dialing from ext.2020 to ext.4001, however, a fast busy can only be received when dialing from ext.4001 to ext.2020.
Please choose the most possible reason of this issue from the following statements.
A. The h323-gateway voip bind srcaddr 10.3.130.1 command has been omitted from the BR2 configuration.
B. An incorrect CSS has been applied to the gateway at HQ.
C. A CSS has been omitted from the trunk configured to BR2.
D. A transaction rule has been applied that is keeping the call from being completed.
Question 5
Acme Corporation has Cisco IP Phones configured in a single-site Cisco Unified Communications Manager cluster. The 10 phones in the accounting department can call each other. Another 10
phones in the finance department can call each other. However, no phones in accounting can call the phones in finance.
Which change is needed to allow all accounting phones to call all finance phones?
A. Ensure that all finance phones are in a CSS that is in a partition that includes the accounting phones.
B. Ensure that all phones are the same Cisco IP Phone model.
C. Ensure that all phones use SCCP signaling.
D. Ensure that all phones use SIP signaling.
E. Ensure that all accounting phones are in a CSS that contains the partition that includes the finance phones.
Solutions:
| Question 1 Answer: C | Question 2 Answer: B | Question 3 Answer: A | Question 4 Answer: A | Question 5 Answer: E |






