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Cisco CCNP Voice 642-427

642-427

Exam Code: 642-427

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

Updated Time: Jul 06, 2026

Q & A: 301 Questions and Answers

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

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

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


2. Which debug command can be used to troubleshoot a PRI issue on a voice gateway?

A) debug voip ccapi inout
B) debug h225
C) debug vpm sig
D) debug Q931


3. In a three-party conference call, what is the total number of active streams available?

A) 4
B) 9
C) 3
D) 1
E) 6
F) 12


4. An IP phone that is connected through a Cisco Catalyst 3750 Series Switch is failing to register with the subscriber as a backup server. When the user presses the settings button on the phone, only the Cisco Unified Communications Manager publisher shows as registered. What is the most likely cause for this issue?

A) The enterprise phone configuration does not have the call control redundancy enabled.
B) The phone does not have the correct Cisco Unified Communications Manager group in the device configuration page.
C) The ip-helper address command for the subscriber is not configured on the switch port.
D) The subscriber does not have the correct device pool configured.
E) The Cisco Unified Communications Manager group that is applied through the device pool is misconfigured.


5. The following is a partial configuration of an access layer switch:
mls qos map cos-dscp 0 8 12 16 28 32 40 48
mls qos
!
Voice bearer traffic will be set to use which per-hop behavior?

A) CS4
B) EF
C) AF32
D) BE
E) AF12


Solutions:

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

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