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Cisco 642-427 Exam Syllabus Topics:

SectionObjectives
Topic 1: Endpoints and Registration Issues- IP phone registration
  • 1. DHCP and TFTP configuration issues
    • 2. Device pool and load balancing problems
      - Endpoint performance issues
      • 1. Phone registration failures
        • 2. Device firmware and compatibility issues
          Topic 2: Voicemail and Unified Messaging- Cisco Unity Connection troubleshooting
          • 1. Call handler and routing rules issues
            • 2. MWI (Message Waiting Indicator) failures
              Topic 3: Call Control and Dial Plan Troubleshooting- Dial plan configuration issues
              • 1. Route patterns and translation patterns
                • 2. Calling search space misconfiguration
                  - Call routing failures
                  • 1. Intra-cluster and inter-cluster routing
                    • 2. SIP trunk and gateway routing issues
                      Topic 4: Cisco Unified Communications Architecture Troubleshooting- CUCM core components and services
                      • 1. Database and service failure troubleshooting
                        • 2. Call processing and call control analysis
                          - Cluster and server health issues
                          • 1. Publisher/subscriber synchronization issues
                            • 2. Service activation and dependency problems
                              Topic 5: QoS and Network Integration- Voice quality issues
                              • 1. QoS marking and prioritization problems
                                • 2. Jitter, latency, and packet loss analysis
                                  Topic 6: Voice Gateway and Protocol Troubleshooting- Media and codec issues
                                  • 1. RTP stream failures
                                    • 2. Codec mismatch and negotiation issues
                                      - Signaling protocols
                                      • 1. H.323 gateway troubleshooting
                                        • 2. MGCP gateway control problems
                                          • 3. SIP call setup and teardown issues

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

                                            Question 1

                                            Refer to the Exhibit.

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

                                            A. \+1408[2-9]XXXXXX and the ToDID will be 0:
                                            B. 1408[2-9]XXXXXX and the ToDID will be 0:+1408[2-9]XXXXXX
                                            C. [2-9] XXXXXX and the ToDID will be 0:+1408[2-9]XXXXXX
                                            D. \+1408[2-9]XXXXXX and the ToDID will be empty
                                            E. \+1408[2-9]XXXXXX and the ToDID will be 0:+1408[2-9]XXXXXX


                                            Question 2

                                            HOTSPOT


                                            Question 3

                                            Which two log files contain the issues related to audio quality? (Choose two.)

                                            A. diag_CuSysAgent_*.uc
                                            B. diag_CuMixer_*.uc
                                            C. diag_CuReportDataHarvester_*.uc
                                            D. diag_SttService_*.uc
                                            E. diag_CuNotifier_*.uc
                                            F. diag_CuCsMgr_*.uc


                                            Question 4

                                            Cisco CallManager 5.0 has just been deployed in two locations across a wide-area link. A distributed model with an intercluster trunk has been used. When you call an IP phone at the remote site the phone rings, but as soon as the other person picks up the phone, the call is dropped.
                                            Where should you look to diagnose the problem?

                                            A. system parameters
                                            B. media resource group
                                            C. Cisco Unified CallManager CTI traces
                                            D. locations
                                            E. Cisco Unified CallManager group


                                            Question 5

                                            As a network administrator, you should know the features of H.323 gatekeeper. Which H.323 gatekeeper feature allows calls to be routed to a specific zone, regardless of the zone prefix in the address?

                                            A. Technology prefix with hop-off
                                            B. E.164 registration
                                            C. Subnet scoping
                                            D. Default technology prefix


                                            Solutions:

                                            Question 1
                                            Answer: D
                                            Question 2
                                            Answer: Only visible for members
                                            Question 3
                                            Answer: B,F
                                            Question 4
                                            Answer: B
                                            Question 5
                                            Answer: A

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