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Troubleshooting Unified Communications (TUC) : 642-426 Exam

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

Exam : Cisco 642426

Title :

Troubleshooting Unified

Communications (TUC)

Update : Demo

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

2. Refer to the exhibit. You have received a trouble ticket stating that users cannot place calls to the PSTN. During testing you discover the gateway is not switching to the secondary call agent when the primary call agent is unreachable.
What needs to be done to allow the MGCP gateway to use a different call agent if the primary fails?

A. The ccmmanager fallbackmgcp command needs to be added to the gateway.

B. The ccmmanager redundanthost command needs to be added to the gateway.

C. A Cisco Unified CallManager group that includes the secondary call agent needs to be assigned to the

gateway.

D. The gateway needs to be defined as a nongatekeepercontrolled intercluster trunk with the secondary

Cisco Unified CallManager defined. Answer: B

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 plugin 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 plugin.
D. Configure the proper trace settings on the Cisco Unified CallManager Serviceability page and download the RTMT plugin 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. Tailend echo Answer: B

6. Your Cisco Unified CallManager 5.0 cluster has just started to use a thirdparty 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 you 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

phone 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

8. Refer to the exhibit. A site is using fourdigit extensions for internal calling. The voicemail pilot number

is 8000. Calls to extension 2001 hear the Cisco Unity opening greeting instead of the subscriber’s

greeting when forwarded to Cisco Unity. What is the probable cause?

A. The mailbox is configured with the E.164 number instead of the extension.

B. A call routing rule has been added that is preempting the Attempt Forward rule. C. Extension 2001 has not been defined in Cisco Unity.
D. A greeting has not been recorded for mailbox 2001.

E. The Voice Mail Box Mask setting in Cisco Unified CallManager is set to 8000 instead of XXXX Answer: E

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

10. Refer to the exhibit. You have received a trouble ticket that users cannot place calls to the PSTN.

During testing you discover the gateway is not switching to the secondary call agent when the primary call agent is unreachable.
What needs to be done to allow the MGCP gateway to use a different call agent if the primary fails?

A. The ccmmanager fallbackmgcp command needs to be added to the gateway.

B. The ccmmanager redundanthost command needs to be added to the gateway.

C. A Cisco Unified CallManager group that includes the secondary call agent needs to be assigned to the gateway.
D. The gateway needs to be defined as a nongatekeepercontrolled intercluster trunk with the secondary

Cisco Unified CallManager defined. Answer: C

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

12. Refer to the exhibit. Voice bearer traffic is mapped to which queue in FastEthernet0/2?

A. Queue 1

B. Queue 2

C. Queue 3

D. Queue 4

Answer: B

13. Which log file contains callprocessing information from services such as Cisco Unified CallManager and Cisco Unified CallManager CTI Manager?

A. CTI trace

B. SDI trace

C. CDROnDemand D. SDL trace Answer: B

14. You have received a trouble ticket from a user who could not leave a message for John Doe at extension 2001. The user stated that when the call was forwarded to voicemail, the Cisco Unity opening greeting was played instead of John Doe’s greeting. Which three issues could cause this problem?
(Choose three.)

A. The exchange server was down and Cisco Unity was operating in UMR mode.

B. A Cisco Unity call routing rule was added that prevented the Attempt Forward rule from being applied to the call.
C. The voicemail port used was configured only for Message Notification and MWI Outdial. D. Extension 2001 was not configured with the correct voicemail profile.
E. John Doe’s mailbox does not have the correct extension configured in Cisco Unity.

F. A translation pattern modified the redirecting number. Answer: BDE

15. Partition A contains four route patterns. The calling search space assigned to Device B contains only

Partition A. When Device B dials 1136, which of the route patterns will be selected? A. 1[14]XX
B. 11X!

C. 1[^28]XX D. 1[14]XX Answer: B

16. Which two methods can be used to correct database replication issues in a cluster running Cisco

Unified CallManager 4.1? (Choose two.)

A. Enter the utils dbreplication repair command at the commandline prompt.

B. Execute the dblhelper utility on the publisher.

C. Use the SQL Server Enterprise Manager application to recreate the database subscription.

D. Run the Cisco Unified CallManager BARS utility to restore the database to the subscriber.

E. Use the Informix database utility to recreate the database subscription. Answer: BC

17. Your customer has implemented a multipoint control unit to allow conferencing between existing Cisco

Unified Video Advantage users. The multipoint control unit appears to be properly configured, but users are complaining that when they conference they get audio but no video. What is the most likely cause?
A. The region configuration is selecting an incorrect codec.

B. The partition or CSS configuration configuration is preventing video setup. C. The QoS policy is placing video packets in the default queue.
D. The MRGL configuration is selecting the incorrect conference resource. Answer: D

18. You are troubleshooting why a user cannot make calls to the PSTN. You are reviewing trace files and you have found where the user’s IP phone initiates the call but you never see the call go out the gateway. What is the next step in troubleshooting this issue?
A. Look in the SDL trace file to see if there is a signal to another Cisco Unified CallManager node with the same timestamp.
B. Look in the SDL trace file to see if there is a signal to another Cisco Unified CallManager node with the same TCP handle.
C. Look in the IP Voice Media Streaming App trace file to see if an MTP was invoked.

D. Look in the MGCP trace file to determine which MGCP gateway the call was sent to. Answer: A

19. You have two Cisco Unified CallManager clusters each using endpoint authentication. You have

moved a small group of users from Cluster 1 to Cluster 2 and now their phones are failing to register with

Cluster 2. Each phone displays the error message “failure to authenticate on the CTL file”.

Which step should be taken to resolve this issue?

A. Restart the Cisco CTL Provider and the Cisco Certificate Authority Proxy Function. B. Reset each IP phone so the correct CTL file can be downloaded.
C. Perform a factory reset on each IP phone so the correct CTL file can be downloaded.

D. Press the Settings button on each IP phone, select the Security Configuration menu, and reset the trust list.
Answer: C

20. Your company has recently installed a Cisco Unified CallManager cluster and a Cisco Unity voice mail platform. You have received complaints from users that the red MWI light never comes on, even when
there are new voicemail messages in the voice mailboxes. Which two steps must be taken to resolve this issue? (Choose two.)
A. Verify, using the Port Usage tool, that the ports dedicated to MWI on/off are not overutilized. Add another dedicated port if the current port is overutilized.
B. Verify that the MWI on/off numbers are unique within the Cisco Unified CallManager cluster dial plan. If they are not, change the MWI on/off numbers in the Cisco Unified CallManager cluster so they are unique and configure the Cisco Unity server so they match.
C. Ensure that the number of ports licensed for the Cisco Unity server is greater than or equal to the

number of configured ports.

D. Verify that the calls are being sent to the correct ports on the Cisco Unity server. If they are being sent

to the incorrect ones by the Cisco Unified CallManager cluster, correct the values in the cluster.

E. Verify that the same numbers are being used for MWI on/off in both the Cisco Unified CallManager cluster and Cisco Unity server. If they are different, change the Cisco Unity server to match the Cisco Unified CallManager cluster.
Answer: BE

21. You have developed a dial plan for a Cisco Unifed CallManager 5.0 solution. All the route patterns, partitions, calling search spaces, and translation rules have been configured. Before starting up the

system you wish to test the dial plan for errors.

Which Cisco Unifed CallManager tool will simplify this testing? A. Dial Plan Installer
B. RTMT Traces and Alarms

C. Route Plan Report

D. Dialed Number Analyzer

Answer: D

22. In order for a thirdparty SIP phone to register with a Cisco Unified CallManager cluster, which three configuration parameters must match between the phone and the cluster? (Choose three.)
A. device pool

B. DN

C. username

D. password

E. MAC address F. SIP profile Answer: BCE

23. You have configured an ISR at a branch office to register as an Enhanced IOS media resource providing transcoding services. The transcoder has not been placed into a media resource group. Which statement best describes which devices will be able to utilize this transcoder?
A. No devices will be able to utilize the transcoder until it is placed in a media resource group.

B. Only devices at the branch office will be able to utilize the transcoder.

C. Only devices configured to use G.729 will be able to utilize the transcoder.

D. Only devices that have not been assigned an MRGL will be able to utilize the transcoder.

E. All devices will be able to utilize the transcoder. Answer: E

24. You have configured the Enable Keep Alive check box under Trace Filter Settings. How does this

change the trace output?

A. It adds TCP socket numbers between the endpoint and Cisco Unified CallManager for the session.

B. It maps the unique TCP handle for the endpoint to the MAC address of the endpoint in the trace output.

C. It adds the IP address of the endpoint in hex.

D. It adds the SCCP messages and all fields sent as part of that message. Answer: B

25. You have just obtained a list of the following options: All Patterns
Unassigned DN Call Park Conference Directory Number Translation Pattern Call Pickup Group Route Pattern Message Waiting Voice Mail Attendant Console
What have you selected in order to produce this list? A. Control Center > Feature Services
B. Dialed Number Analyzer

C. Route Plan > Route Plan Report

D. Route Plan > External Route Plan Wizard

Answer: C

26. Refer to the exhibit. You have received a trouble ticket that two engineers at the HQ site tried to conference at a user location at the Branch site and the adhoc conference failed.
Further investigation reveals that the remote user can occasionally be conferenced in. Phones are

configured to use G.711 for intrasite calls and G.729 for intersite calls. All phones at the remote site are

configured to use MRGL_Branch, which contains only the media resource group named BRANCH. What should be done to correct this issue?

A. The software conference bridge CFB_2 should be removed from the Branch media resource group.

B. The hardware conference bridge CFB0012005FEEF1 should be listed first in the Branch media resource group so it is utilized if it is available.
C. Additional hardware conference resources should be added.

D. The number of sessions allowed per conference should be increased. Answer: A

27. You have added a subscriber server to your Cisco Unified CallManager 5.0 cluster. The server is functioning properly, but regular updates from the publisher are failing. All other publishersubscriber communications are working properly in the cluster.
What is the problem?

A. the service isn’t included in the current CTL client

B. the correct username and password are not being applied in the subscriber

C. the Cisco Unified CallManager Administrator username and password have been changed in the

publisher

D. the CTL client wasn’t signed with the security token when the service was included in it

E. the MIC for the service needs to be included in the CTL client

Answer: B

28. Refer to the exhibit. A user at BR1 is on a call to the PSTN through the PRI interface on the local

H.323 gateway. The IP WAN has just failed and the call has been dropped. What is causing the call to be dropped?

A. The H.323 gateway has lost the D channel on the PRI.

B. SRST hasn’t been configured on the BR1 gateway.

C. The no h225 timeout keepalive command has not been configured on the gateway. D. The IP phone hasn’t registered with SRST.
Answer: C

29. You have received a trouble ticket stating that an executive with an account at a bank cannot retrieve account information by phone. When the executive calls the bank, the call is answered and the executive
is prompted to enter the account code. However, the bank does not seem to recognize the DTMF tones and disconnects the call.
What is a possible solution to this problem?

A. Configure the voice rtp sendrecv command in the gateway.

B. Set the Cisco Unified CallManager service parameter ToSendH225UserInfoMsg to True.

C. Configure the progress_ind setup enable 3 command under the gateway VoIP dial peer.

D. Configure the progress_ind alert enable 8 command under the gateway POTS dial peer.

Answer: A

30. The following is a partial configuration of an access layer switch:

mls qos map cosdscp 0 8 12 16 28 32 40 48

mls qos

Voice bearer traffic will be set to use which perhop behavior? A. EF
B. CS4

C. AF32

D. AF12

E. BE Answer: B

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“Troubleshooting Unified Communications (TUC)”, also known as 642-426 exam, is a Cisco certification.
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