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Cisco 642-427 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Cisco Unity and Voice Applications | - Voicemail integration issues - Messaging service troubleshooting |
| Topic 2: Quality of Service and Voice Quality | - QoS verification and troubleshooting - Voice quality diagnostics - Latency, jitter, and packet loss analysis |
| Topic 3: Cisco Unified Communications Manager | - Device registration problems - Call processing issues - Dial plan troubleshooting |
| Topic 4: Troubleshooting Methodology | - Diagnostic tools and techniques - Structured troubleshooting process - Log and trace analysis |
| Topic 5: IP Phones and Endpoints | - Phone registration and provisioning - Firmware and endpoint connectivity issues |
| Topic 6: Media Resources | - Transcoders and conference bridges - Music on Hold and annunciators - Media Termination Points |
| Topic 7: Cisco Unified Presence and Mobility | - Mobility and extension mobility issues - Presence service troubleshooting |
| Topic 8: Voice Gateways and Trunks | - MGCP gateway troubleshooting - H.323 gateway troubleshooting - SIP trunk troubleshooting - PSTN connectivity issues |
Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Sample Questions:
Which two issues can cause a Cisco Unified Communications Manager to fail to register with its Cisco SAF Forwarder? (Choose two.)
- A. CCD advertising service was not activated.
- B. No directory number patterns were configured on the Cisco Unified Communications Manager.
- C. An H.323 SAF trunk was configured instead of a SIP SAF trunk.
- D. CCD requesting service was not activated.
- E. Incorrect user credentials were used on the SAF Forwarder.
Correct Answer: D,E 🗳️
Refer to the exhibits.
When the IP phone 2001 places a call to 9011 49403021 56001, the call is sent to the Cisco Unified Border Element as 40302156001 which is what the ITSP expects to receive. The ITSP support personnel claim that they never saw the call. Issuing the debug CCSIP message command on the Cisco Unified Border Element results in the message "SIP/2 0 404 Not Found".
Refer to the Cisco Unified Border Element configuration, debug voice dial and ccsip messages exhibits. Which situation can cause this issued?
- A. SIP error 404 means that a codec mismatch occurred Cisco Unified Communications Manager is sending the call as an early offer with G.711 codec.
- B. The Cisco Unified Bolder Element is configured as an MGCP gateway also so that the call is attempted via the PSTN
- C. The command allow-connections sip to h323 is missing
- D. The Cisco Unified Communications Manager is rnisconfigured. The SIP invite should be sent to the ITSP at 10.1.2.1.2. The debug ccsip message shows the SIP invite being sent to 10.12.1.2.
Correct Answer: C 🗳️
Explanation: Only visible for LatestCram members. You can sign-up / login (it's free).
When a Cisco Unified Border Element connects two VoIP streams using flow-around media, which of the following options describe the components of the call that flow around and the components that flow through the device?
- A. The initial call-signaling traffic flows through the device to initiate the call and then all subsequent calls flow around the device.
- B. Call signaling flows through and call media flows around the device.
- C. All security information flows through the Cisco Unified Border Element, and all call signaling and RTP flows around the device.
- D. Call media flows through and call signaling flows around the device.
Correct Answer: B 🗳️
Explanation: Only visible for LatestCram members. You can sign-up / login (it's free).
As a network administrator, you should be familiar with the bandwidth command. Which parameter of the bandwidth command is used in gatekeeper configuration mode to specify the maximum amount of bandwidth that can be allocated in a zone?
- A. total
- B. interzone
- C. session
- D. remote
Correct Answer: A 🗳️
Explanation: Only visible for LatestCram members. You can sign-up / login (it's free).
When users in headquarters call branch office users over the WAN link, branch users report poor audio quality. Headquarters users consistently experience acceptable audio quality.
Which troubleshooting approach most directly improves the audio quality of the branch users?
- A. Make the headquarters router configuration for LLQ match the branch router.
- B. Make the headquarters router configuration for CBWFQ match the branch router.
- C. Make the branch router configuration for LLQ match the headquarters router.
- D. Make the branch router configuration for CBWFQ match the headquarters router.
Correct Answer: A 🗳️
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