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Cisco 642-427 Exam Syllabus Topics:

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

1. You are a network technician with many years' experience. Many users complain that they can hear echo when their calls go out an H.323 gateway. You have made some testing for the gateway and have changed the configuration. So the ERL level turns to be 6 dB. Furthermore, the echo-cancel coverage value is raised to 64 ms. Please choose the effect on the voice quality after this modification.

A) Consonants will be chopped by the echo canceller.
B) The increase in echo-cancel coverage will have no effect on voice quality.
C) The echo canceller will take 2-3 seconds longer to converge at the beginning of the call.
D) The ends of sentences will be chopped by the echo canceller.

2. 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) Authorization has not been configured for a third party LDAP service.
B) The LMHOSTS file has been corrupted.
C) There is a username and or password mismatch between the Cisco Unified CallManager cluster and the Windows AD server.
D) The domain controllers are down.
E) The synchronization on the AD server was set to manual.

3. What are three requirements for Quality of Service for voice calls? (Choose three.)

A) PoE-supported Layer 2 switches used to connect IP Phones
B) one-way latency less than or equal to 150 ms
C) loss less than or equal to 1 percent
D) jitter less than or equal to 30 ms
E) guaranteed bandwidth of 384 kbps for a voice call
F) jitter less than or equal to 45 ms

4. Refer to the exhibit. When the user tried to do no shut on the dspfarm profile, the command was accepted but the dspfarm was still in a shutdown state. Which statement indicates the correct resolution or reason for the issue?

A) The command dsp services dspfarm must be configured under the voice-card configuration.
B) The conference bridge is not registered in Cisco Unified Communications Manager.
C) The dspfarm command under the voice card is missing.
D) The command maximum conference-participants value must be configured.
E) The maximum sessions that are allowed was exceeded.

5. Refer to the exhibit.

Which configuration is the correct Cisco IOS configuration that corresponds to the Cisco SAF Forwarder that is shown in the exhibit?

A) Exhibit A
B) Exhibit B
C) Exhibit C
D) Exhibit D

Solutions: