Troubleshooting Unified Communications (TUC) : 642-426 Exam

Exam Number/Code: 642-426
Exam Name: Troubleshooting Unified Communications (TUC)

“Troubleshooting Unified Communications (TUC)”, also known as 642-426 exam, is a Cisco certification.
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642-426 TUC
Troubleshooting Unified Communications
Exam Number: 642-426
Associated Certifications: CCVP
Duration: 90 minutes (54 questions)
Available Languages: English
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Exam Description Exam Topics Recommended Training Additional Resources
Exam Description

The 642-426 Troubleshooting Unified Communications (TUC) exam is the exam associated with the CCVP certification. Candidates can prepare for this exam by taking Troubleshooting Cisco Unified Communications (TUCv1.0) course. The exam will certify that the successful candidate has the knowledge and skills necessary to troubleshoot Enterprise CallManager, Unity, and IP network deployments. The exam addresses hands-on experience in configuring, deploying, and troubleshooting Unified Communications solutions. Topics covered include (see Claims and Components attached).
Exam Topics

The following topics are general guidelines for the content likely to be included on the Remote Access exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.
Apply the Cisco recommended methodology used to determine general Unified communications system problems and issues

* Describe the steps that can be used to identify a problem with a given unified communication system
* Identify tools that can be used to identify and isolate problems
* Correlate events (using traces, logs, and monitoring tools to identify the problem)
* Parse and interpret trace logs and system logs

Troubleshoot call setup issues

* Troubleshoot PSTN call setup issues
* Troubleshoot intersite call setup issues
* Troubleshoot intrasite call setup issues

Troubleshoot registration issues

* Troubleshoot issues with endpoint registration
* Troubleshoot issues with gateway registration
* Troubleshoot issues with gatekeeper registration

Troubleshoot database issues

* Troubleshoot database replication issues in CallManager 4.x
* Troubleshoot database replication issues in CallManager 5.x
* Troubleshoot 3rd party LDAP synchronization issues

Troubleshoot application issues

* Troubleshoot voicemail integration
* Troubleshoot CTI integration issues
* Troubleshoot IP phone XML services

Troubleshoot media resources

* Troubleshoot music on hold
* Troubleshoot conference bridges
* Troubleshoot transcoders
* Troubleshoot MTP

Troubleshoot voice quality issues

* Troubleshoot echo
* Troubleshoot dropped calls
* Troubleshoot audio quality issues

Troubleshoot security issues

* Troubleshoot authentication issues
* Troubleshoot certificate issues

1. Your Cisco Unified CallManager 5.0 cluster is using your corporate Windows 2003 Active Directory for user
information. Over the weekend you updated the Windows 2003 Active Directory Server and added a small group
of new users. Cisco Unified CallManager is configured to synchronize with the Active Directory server every 8
hours and it has been 32 hours since the last successful synchronization. The configuration on Cisco Unified
CallManager did not change during the Active Directory server upgrade and the remainder of the Windows
network is functioning properly.

What are two possible causes of this synchronization issue? (Choose two.)
A. The synchronization on the AD server was set to manual.
B. The domain controllers are down.
C. There is a username and or password mismatch between the Cisco Unified CallManager cluster and the
Windows AD server.
D. Authorization has not been configured for a third party LDAP service.

E. The LMHOSTS file has been corrupted.
Answer: BC

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3. You have received a trouble ticket stating that when callers dial the internal Help Desk queue at extension 2300,
they hear a message that their calls cannot be completed as dialed. Which two issues could cause this problem?
(Choose two.)
A. There are no agents logged in to the Help Desk queue.
B. The script associated with the Help Desk queue is corrupt.
C. There is a connectivity issue between Cisco Unified CallManager and the Cisco Unified Contact Center
Express server.
D. The route point for 2300 has been modified or deleted in Cisco Unified CallManager, resulting in a
synchronization issue.
E. The CSS of the route point for 2300 is incorrect.
Answer: CD

4. When using trace output to troubleshoot a Cisco Unified CallManager 5.0 problem, how can you collect and
view the trace files?
A. Download the RTMT plug-in from the Cisco Unified CallManager Serviceability page to view the
preconfigured trace files.
B. Configure the proper trace settings on the Cisco Unified CallManager Serviceability page and then use the
embedded RTMT tool to view the trace files.
C. Configure the proper alarms and traces on the Cisco Unified CallManager Administration page and view the
output with the RTMT plug-in.
D. Configure the proper trace settings on the Cisco Unified CallManager Serviceability page and download the
RTMT plug-in from the CallManager Administration page to view the trace output.
Answer: D

5. Which type of echo is found mostly on tail circuits and is due to reflection that causes the Tx signal to appear

on the Rx signal?
A. Hybrid echo

B. Talker echo
C. Listener echo
D. Tail-end echo
Answer: B

6. Your Cisco Unified CallManager 5.0 cluster has just started to use a third-party LDAP service. Users complain
that they are unable to make changes to their passwords in their Cisco Unified CallManager user web pages. How
should you resolve this problem?
A. Restart the phones that are having problems to reinitialize the LDAP database.
B. Have the users make changes to their passwords in the LDAP database.
C. Configure automatic synchronization of the LDAP database.
D. Change the passwords on the IP phone screen using the TUI.
Answer: B

7. You have received a trouble ticket stating that an IP phone is not working. When asked, the user informs yo
the phone is displaying the message “Registration rejected.” Which two issues are possible causes of this problem
(Choose two.)
A. The IP phone is not getting an IP address.
B. The IP phone’s primary Cisco Unified CallManager has a database replication issue.
C. The primary Cisco Unified CallManager is unavailable and the CallManager group assigned to the IP phon
does not include a secondary CallManager.
D. The IP phone has not been defined in Cisco Unified CallManager.
E. The IP phone is not associated with a valid user profile.
Answer: BD

9. What happens if CDP is not enabled on a switch port to which an IP phone is connected?
A. The phone is unable to acquire an IP address.
B. The phone cannot get its VLAN ID assignments.
C. The phone cannot learn the address of the TFTP server.
D. The switch will put the port into the errDisable state until CDP is enabled.
Answer: B
11. LSC validation is failing on a new SCCP IP phone you have just added to the Cisco Unified CallManager 5.0
cluster. No other IP phones are experiencing any problems with LSC validation. What can you do to help pinpoint
the problem?
A. View the SDI trace output.
B. Check for security alarms.
C. Use the security configuration menu on the IP phone to verify that an LSC has been downloaded to the IP
phone.
D. Verify that the authentication string is correct in the Cisco Unified CallManager device configuration screen.
Answer: C

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Questons and Answers : 55 Q&As

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