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

642-427 real exams

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. Which voice translation rule will expand extensions that are in the 3000-3999 range to a 10-digit number?

A) /^3...$//408555&/
B) /^3...\(... .$\)//408555\
C) /^3...\(... .$\)//408555\1/
D) /3...//4085553/
E) /^...\(... .$\)/^1/


2. What are the two most common causes of echo? (Choose two.)

A) signal reflection
B) excessive packet loss
C) incorrect IP phone software loads
D) misconfigured tail circuits
E) impedance mismatch at the two-wire to four-wire hybrid


3. You have a Cisco Unified Communications Manager cluster with four servers that are integrated with two Cisco Unity Connection servers and two Cisco Unified Contact Center Express servers. Some of the Cisco IP Phones are not implementing configuration changes that you assign to them.
Which troubleshooting approach can you implement to have the Cisco IP Phones accept all configuration changes?

A) Synchronize the databases in Cisco Unity Connection and Cisco Unified Contact Center Express.
B) Synchronize the database between Cisco Unity Connection and of Cisco Unified Communications Manager.
C) Synchronize the database between Cisco Unified Contact Center Express and Cisco Unified Communications Manager.
D) Synchronize the database between the Publisher and the Subscriber of Cisco Unified Communications Manager.


4. Refer to the Exhibit.

The Exhibit shows the output of an unsuccessful RSVP call setup that uses G.711 codec. Which configuration on serial 0/1/0.121 would resolve that issue?

A) ip rsvp bandwidth 96 96
B) ip rsvp bandwidth 40 24
C) ip rsvp bandwidth 40 40
D) ip rsvp bandwidth 96 80
E) ip rsvp bandwidth 80 16


5. In Cisco Unified Communications Manager (CUCM), you have three Service Advertisement Framework (SAF) forwarders configured, what happens when the primary and the backup SAF forwarders fail?

A) The third SAF forwarder automatically becomes the primary SAF forwarder.
B) Primary and backup SAF forwarders are re-initated automatically.
C) CUCM continues to work without connecting to the third SAF forwarder.
D) CUCM tries to reconfigure the existing primary and backup SAF forwarders.
E) You will need to designate another primary SAF forwarder.
F) TCP timer continues to initiate connection with the primary and backup SAF forwarders.


Solutions:

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

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