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Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) : 642-427

642-427

Exam Code: 642-427

Exam Name: Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0)

Updated: Jun 02, 2026

Q & A: 301 Questions and Answers

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

1. A customer is trying to register an IP phone. During the registration process, the IP phone receives the configuration file (.xml) from the TFTP server. Which input can you find in the configuration file that is downloaded to the IP phone?

A) speed dials
B) firmware to be loaded on IP phone
C) IP address of the IP phone
D) valid locally significant certificate
E) location of the DHCP server
F) extension number


2. A company has migrated to a Cisco Unified CallManager IP Telephony system and is now replacing the existing voice-mail system with a Cisco Unity voice-mail system. A small group of users has been established to test the new voice mail system. The users were able to initialize their mailboxes and record greetings; however, during testing the callers were sometimes unable to leave voice-mail messages for Cisco Unity users.
Which two issues could cause this problem? (Choose two.)

A) There is a mismatch in the number of ports configured in Cisco Unified CallManager and Cisco Unity.
B) Cisco Unity is in a G.729 region and has not been configured to support G.729.
C) There is a mismatch in the MWI on/off numbers configured in Cisco Unified CallManager and Cisco Unity.
D) The hunt group is hunting to Cisco Unity ports that have been dedicated for message notification.
E) The call transfer call handlers are not configured correctly.


3. When parsing trace output after the call routing decision and path selection have been made, which two records can be found in the CCM|RouteList? (Choose two.)

A) PretransfromDigitString
B) RouteListName
C) CallingPartyNumber
D) PretransformCallingPartyNumber
E) findLocalDevice
F) RouteListCdrc


4. You are troubleshooting why a user cannot make calls to the PSTN. You are reviewing trace files and you have found where the user's IP phone initiates the call but you never see the call go out the gateway. What is the next step in troubleshooting this issue?

A) Look in the MGCP trace file to determine which MGCP gateway the call was sent to.
B) Look in the IP Voice Media Streaming App trace file to see if an MTP was invoked.
C) Look in the SDL trace file to see if there is a signal to another Cisco Unified CallManager node with the same TCP handle.
D) Look in the SDL trace file to see if there is a signal to another Cisco Unified CallManager node with the same time-stamp.


5. What is the maximum number of characters that you can use in Service Advertisement Framework (SAF) forwarder name?

A) 40
B) 50
C) 10
D) 60
E) 20
F) 30


Solutions:

Question # 1
Answer: B
Question # 2
Answer: C,D
Question # 3
Answer: B,F
Question # 4
Answer: D
Question # 5
Answer: B

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