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Cisco 642-427 Exam Syllabus Topics:

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

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

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

2. You must integrate a third-party H.323 system with your existing Cisco Unified Communications Manager cluster. When you create an H.323 trunk from the cluster, calls from the cluster to the third-party H.323 system are failing. The vendor of the third-party H.323 device has confirmed that the H.323 call setup time must be reduced.
Which two approaches reduce the call setup time from Cisco Unified Communications Manager to the third-party H.323 device? (Choose two.)

A) Implement transcoding with the Cisco Unified Communications Manager resources.
B) Implement transcoding with the router DSP resources.
C) Implement a software MTP.
D) Implement a hardware MTP.

3. An IP phone that is connected through a Cisco Catalyst 3750 Series Switch is failing to register with the subscriber as a backup server. When the user presses the settings button on the phone, only the Cisco Unified Communications Manager publisher shows as registered. What is the most likely cause for this issue?

A) The Cisco Unified Communications Manager group that is applied through the device pool is misconfigured.
B) The enterprise phone configuration does not have the call control redundancy enabled.
C) The phone does not have the correct Cisco Unified Communications Manager group in the device configuration page.
D) The subscriber does not have the correct device pool configured.
E) The ip-helper address command for the subscriber is not configured on the switch port.

4. Two Cisco Unified Communications Manager clusters have recently been installed. One is in Tokyo and the other in Chicago connected by a WAN link. You have started the configuration of a SIP trunk and you are integrating the dial plans. All phones in Tokyo can call all phones in Chicago, but no phones in Chicago can call Tokyo phones.
Which two statements are possible causes? (Choose two.)

A) Tokyo phones are in a CSS that is not in the partition of the route pattern to call from Tokyo to Chicago.
B) The SIP trunk in Chicago is in a CSS that is not in the partition of the Chicago phones.
C) The CSS of the Chicago phones does not include the partition of the route pattern to point to Tokyo.
D) The SIP trunk is configured from Tokyo to Chicago, but not from Tokyo to Chicago.
E) The Tokyo SIP trunk inbound CSS does not contain the partition of the Tokyo phones.

5. You are trying to access the GUI of Cisco Unified Communications Manager. However, it displays a "not accessible" error. In Cisco Unified Serviceability, which two services should you check for and ensure are running on the Control Center - Network Services page? (Choose two.)

A) Cisco Tomcat
B) Cisco CallManager
C) Cisco Certificate Expiry Monitor
D) Cisco Tomcat Stats Servlet
E) Cisco Trust Verification Service
F) System Application Agent

Solutions: