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

  • Exam Code: 642-427
  • Exam Name: Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0)
  • Updated: Jun 20, 2026
  • Q & A: 301 Questions and Answers

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

1. At what step do you restart the troubleshooting process if after observing the result of your troubleshooting, the problem still exists?

A) Process Problem Resolved
B) Observe Results
C) Implement Acton Plan
D) Define the Problem
E) Consider the Possibilities
F) Restart Problem-Solving
G) Gather Facts
H) Create Action Plan


2. Refer to the exhibit. When a Cisco IP Communicator phone roams from San Jose (SJ) to RTP, the Cisco IP Communicator physical location changes to RTP, and the device mobility group remains the same. All route patterns are assigned a route list that points to the local route group. All device pools are configured to use the local route group. Which statement is true when the roaming phone places a call to 90114989531212001#?

A) The call will use the 9.011!# route pattern in the RTP_International partition and egress at the RTP gateway.
B) The call will use the 9.011!# route pattern in the RTP_International partition and egress at the SJ gateway.
C) The call will use the 9.011!# route pattern in the SJ_International partition and egress at the SJ gateway.
D) The call will use the 9.011!# route pattern in the SJ_International partition and egress at the RTP gateway.
E) Since globalized call routing is not configured, the SJ gateway will be used in this case.


3. 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) Incorrect user credentials were used on the SAF Forwarder.
C) An H.323 SAF trunk was configured instead of a SIP SAF trunk.
D) No directory number patterns were configured on the Cisco Unified Communications Manager.
E) CCD requesting service was not activated.


4. An H.323 gatekeeper maintains a separate gateway list, ordered by priority, for each of its zone prefixes. Suppose that a gateway does not have an assigned priority for a zone prefix. Please choose the default priority of this gateway.

A) 5
B) 0
C) 10
D) 32


5. Refer to the exhibits.




The gateway CSS for inbound calls is configured using internal. CSS, which contains all the directory number partitions for the phones. When a PSTN call that is destined for extension 2001 arrives at the MGCP gateway, the call falls. Use the debug and configuration information in the exhibits to determine what might be causing this issue?

A) The hostname for the gateway does not match the configuration in Cisco Unified Communications Manager.
B) The backhaul link is not open.
C) Incoming dial-peer configuration is needed.
D) The MGCP gateway L3 timers need to be increased.
E) The gateway is using partial PRI, which is not supported in MGCP mode.


Solutions:

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

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