Exam Code: 642-427
Exam Name: Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0)
Certification Provider: Cisco
Corresponding Certification: CCNP Voice
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Cisco 642-427 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Advanced Features and Applications20%- Call Control Discovery (CCD) and SAF
- Media resources, voice quality, and QoS issues
- Extension Mobility Cross Cluster
Topic 2: Integrated Solution Troubleshooting10%- Presence and IM service troubleshooting
- Unity Connection integration issues
Topic 3: CUCM and Registration Troubleshooting25%- CUCM service availability and database replication
- Gateway and trunk registration (SIP, H.323, MGCP)
- Endpoint and IP phone registration issues
Topic 4: Call Setup and Dial Plan Troubleshooting25%- Globalized call routing and number transformation
- Dial plan, route patterns, partitions, CSS, translation rules
- Intrasite, intersite, and off-net call failures
Topic 5: Troubleshooting Methodology and Tools20%- Monitoring and diagnostic tools: RTMT, Serviceability, traces, logs, debugs
- Systematic troubleshooting approach

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

Refer to the exhibit.

When a Cisco Unified Communications Manager Express advertises the directory number pattern in the exhibit, what would the learned pattern be in the RTMT tool on the Cisco Unified Communications Manager?

  • A. 4XXX and the ToDID will be 0:+19725554XXX
  • B. 19725554XXX and the ToDID will be 0:+1972555
  • C. 4XXX and the ToDID will be 0:19725554XXX
  • D. 4XXX and the ToDID will be 0:1972555
  • E. 4XXX and the ToDID will be 0:+1972555
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Explanation: Only visible for ExamBoosts members. You can sign-up / login (it's free).

Refer to the exhibit.

How does a switch port that receives marked traffic from a Cisco IP phone use the mls qos trust cos command?

  • A. CoS is used to select the ingress and egress queues.
  • B. For non-IP packets, the CoS is set to 7 and DSCP-to-CoS mapping is not applied.
  • C. The CoS setting is modified according to the CoS-to-DSCP map.
  • D. The DSCP-to-CoS map is applied.
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Explanation: Only visible for ExamBoosts members. You can sign-up / login (it's free).

You have received a trouble ticket stating that users in accounting are not able to use the CFwdAll softkey to forward their calls to voice mail. Their phones continue to ring when they receive inbound calls, even after they have pressed the CFwdAll softkey and the Messages button. What is a possible cause of this issue?

  • A. The users have not been associated with their phones.
  • B. The phones are not configured to use the standard phone template.
  • C. The users have not been enabled to use CTI.
  • D. There is a database replication issue with the subscriber the phones are registered to.
  • E. The voice-mail ports are not registered.
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Explanation: Only visible for ExamBoosts members. You can sign-up / login (it's free).

Which statement about device mobility is true?

  • A. When local route groups are used, you must configure device mobility groups and phone device CSSs.
  • B. When the device mobility group at the home device pool and roaming device pool are not the same, the Phone will keep the home region.
  • C. When device mobility groups at the home device pool and roaming device pool are the same, the phone will keep the home MRGL setting.
  • D. When local route groups are used, there is no need to configure device mobility groups or phone device CSSs as long as phone line CSSs are used.
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

As a network technician, you should be familiar with RTCP. Which of the following statements best describes a function of RTCP?

  • A. RTCP provides encryption, message authentication and integrity, and anti-replay service for voice streams.
  • B. RTCP caches an RTP packet-Layer 3 and Layer 4 headers in the routers at each end of a link, resulting in lower bandwidth demand for subsequent RTP packets.
  • C. RTCP provides out-of-band control information for an RTP flow
  • D. RTCP uses even-numbered UDP ports in the range 16,384??0?10?0?43??1?0?1C32,767 to transport voice payloads
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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