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Cisco 642-427 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: CUCM and Registration Troubleshooting | 25% | - CUCM service availability and database replication - Endpoint and IP phone registration issues - Gateway and trunk registration (SIP, H.323, MGCP) |
| Topic 2: Troubleshooting Methodology and Tools | 20% | - Monitoring and diagnostic tools: RTMT, Serviceability, traces, logs, debugs - Systematic troubleshooting approach |
| Topic 3: Call Setup and Dial Plan Troubleshooting | 25% | - Dial plan, route patterns, partitions, CSS, translation rules - Globalized call routing and number transformation - Intrasite, intersite, and off-net call failures |
| 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:
1. Refer to the exhibit.
All calls to 4565000 must be routed to the Cisco Unified Communications Manager server
10.10.10.100. All other 7-digit numbers that start with 456 must be routed to the third-party PBX.
Which change is needed to route calls to 4565000 to the Cisco Unified CM server 10.10.10.100 and route all other 7-digit numbers that start with 456 to the third-party PBX?
A) Change dial peer voice 1 pots to dial peer voice 100 pots.
B) Change dial peer 1 to destination-pattern 456....
C) Remove prefix 456 from dial peer 1.
D) Change dial peer 2 to session target 10.10.10.100.
2. When a user attempts to log out from Cisco Extension Mobility service by pressing the services button and selecting the Cisco Extension Mobility service, the user is not able to log out. What is causing this issue?
A) The user device profile is not subscribed to the Cisco Extension Mobility service.
B) The logout URL that is defined for the Cisco Extension Mobility service is incorrect or does not exist under the IP Phone Services configuration.
C) The CTI service is not running
D) The Cisco Extension Mobility service has not been configured on the phone
3. 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 TFTP server outside the Cisco Unified CM cluster to replicate the new firmware from the Cisco Unified CM cluster to the test phone.
B) 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.
C) 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.
D) Modify the DHCP server to make a new scope that includes only the new test phone.
4. Users in a branch office cannot hear MOH when they are on hold. However, users in the headquarters office where Cisco Unified Communications server is installed have MOH enabled and can hear MOH when on hold.
Which action solves this problem?
A) Remove multicast routing in the headquarters router.
B) Enable the MOH file in the branch router flash.
C) Remove multicast routing in the branch router.
D) Enable the MOH file in the headquarters router flash.
5. Please choose the function of an H.323 gateway from the following items.
A) Transmits and receives G.711 PCM-encoded voice
B) Converts an alias address to an IP address
C) Responds to bandwidth requests and modifications
D) Performs translation between audio, video, and data formats
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: B | Question # 4 Answer: B | Question # 5 Answer: D |
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