PDF Version DemoA Cisco credential carries real weight with employers, and the Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) exam is the step that earns it. Getcertkey makes that step shorter with 301 expert-prepared practice questions for the 642-427 exam.
Cisco 642-427 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) |
| Exam Number: | 642-427 |
| Exam Duration: | 90-120 |
| Real Exam Qty: | 30-70 |
| Exam Format: | Multiple Choice, Drag-and-Drop, Simulation |
| Available Languages: | Japanese, English |
| Passing Score: | 825 / 1000 |
| Exam Price: | USD 250-300 |
| Related Certifications: | Cisco Certified Specialist CCNP Collaboration (Legacy) |
| Certificate Validity Period: | 3 years |
| Recommended Training: | Official Cisco Training: Troubleshooting Cisco Unified Communications v8.0 (TVOICE) |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: |  |
| Exam Way: | Onsite at Pearson VUE test centers / Online proctored |
| Pre Condition: | No mandatory prerequisites; recommended knowledge of CVOICE, IPT1, IPT2 and CUCM administration |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/tvoice.html |
Cisco 642-427 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting Methodology and Tools | 20% | - Systematic troubleshooting approach - Monitoring and diagnostic tools: RTMT, Serviceability, traces, logs, debugs |
| Advanced Features and Applications | 20% | - Call Control Discovery (CCD) and SAF - Media resources, voice quality, and QoS issues - Extension Mobility Cross Cluster |
| Integrated Solution Troubleshooting | 10% | - Presence and IM service troubleshooting - Unity Connection integration issues |
| Call Setup and Dial Plan Troubleshooting | 25% | - Globalized call routing and number transformation - Dial plan, route patterns, partitions, CSS, translation rules - Intrasite, intersite, and off-net call failures |
| CUCM and Registration Troubleshooting | 25% | - CUCM service availability and database replication - Gateway and trunk registration (SIP, H.323, MGCP) - Endpoint and IP phone registration issues |
Common Questions About the Cisco 642-427 Exam
What is the Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) exam all about?
The 642-427 exam is the official Cisco exam behind the CCNP Voice certification, validating the skills measured by the Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) credential. It sits at the Professional level of the Cisco certification program. It also connects to CCNP Collaboration (Legacy), Cisco Certified Specialist, so the knowledge you build here carries over to those tracks as well.
How many questions are on the 642-427 exam, and how much time do I get?
The 642-427 exam contains 30-70 questions to be completed within 90-120. Before exam day, divide the available time by the question count to work out a comfortable per-question pace, and mark any item that eats into it so you can return later instead of getting stuck. Timed sessions in the Getcertkey test engines make that pacing automatic — run at least two full-length mock exams under the clock so time pressure never becomes the reason you drop points.
What score do I need to pass the 642-427 exam, and what does it cost?
The passing score for the 642-427 exam is 825 / 1000, and the official registration fee is USD 250-300. Retakes are not discounted — every new attempt means paying the full fee again — so it pays to measure yourself before you book. Work through the 301 practice questions on Getcertkey, sit a timed practice test, and schedule your exam only when your scores are consistently comfortable. That simple habit is the cheapest exam strategy there is.
Are there any prerequisites for the 642-427 exam?
No mandatory prerequisites; recommended knowledge of CVOICE, IPT1, IPT2 and CUCM administration Requirements can change when Cisco revises its certification program, so confirm the current eligibility rules on the official exam page before you register.
How do I register for the 642-427 exam?
You can book the Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) exam through the official registration channels below:
As for delivery, the exam is offered in the following format: Onsite at Pearson VUE test centers / Online proctored. Choose the option that suits you best when you book your seat.
What official training is recommended for the 642-427 exam?
Cisco recommends the following training resources for the Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) exam:
Official courses build the foundation; the 301 practice questions from Getcertkey then show you how that knowledge is examined, so the two work best together.
Can I try the 642-427 practice questions before I buy?
Yes. Getcertkey provides a free 642-427 PDF demo so you can review the question style and answer quality before purchasing. Every purchase also includes 365 days of free updates — if Cisco revises the exam during that period, the updated material reaches you at no cost. Once the free-update year ends, you can extend your update service at a 50% discount.
What if I fail the 642-427 exam, and how is my order delivered?
Every Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) purchase on Getcertkey is covered by a 100% money-back guarantee with clear conditions: if you take the corresponding exam within 60 days of your purchase and do not pass, you can claim a full refund by submitting a scanned copy of your exam enrollment slip and your official score report as a PDF within two days of the exam date; claims are processed within seven days of submission. The guarantee does not apply to exams taken within three days of purchase, to material that was downloaded but never used in an exam attempt, or to free products and expired orders, and the candidate name must match the payer name. If you would rather not take a refund, you can instead exchange your purchase for two free exam preparation products of equal value and keep the update service on your original product.
Delivery is instant: your download is sent to your email within one minute of payment, with no limit on how many computers you may install the material on. If nothing arrives within two hours, check your spam folder and contact customer service for help.
What topics are covered in the 642-427 exam?
The Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) exam blueprint is organized into 5 domains. The first three are:
- CUCM and Registration Troubleshooting — 25% of the exam
- Call Setup and Dial Plan Troubleshooting — 25% of the exam
- Troubleshooting Methodology and Tools — 20% of the exam
For the complete domain-by-domain breakdown, scroll up to the full exam topics outline above and use it to plan how you distribute your study time.
Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Sample Questions:
Question #1
Refer to the exhibit.
An intercluster call was placed from extension 2001 to 3001. The SDI trace was taken from the calling cluster. Which type of SIP call was initiated?
A. Delayed Offer with Early Media
B. Delayed Offer
C. Early Offer
D. Early Media
E. Early Offer with Early Media
Question #2
You have received a trouble ticket stating that users are no longer hearing a second dial tone after pressing 9 to initiate an external call. The trouble ticket states that the second dial tone is played only after several additional digits are dialed. What is the mostly likely cause of this problem?
A. A route pattern beginning with the digit "9" has been added to the route plan with the Call Classification parameter set to OnNet.
B. A route pattern beginning with the digit "9" has been added to the route plan without the Provide Outside Dial Tone check box selected.
C. The Cisco Unified CallManager server is experiencing CPU spikes, causing a delay in playing the second dial tone.
D. The first gateway in the route group is not available, causing a delay in playing the second dial tone while Cisco Unified CallManager queries the second gateway.
Question #3
Refer to the exhibit.
All calls to 4565000 must be routed to the Cisco Unified Communications Manager server
10.10.10.100. All other 7-digit numbers that start with 456 must be routed to the third-party PBX.
Which change is needed to route calls to 4565000 to the Cisco Unified CM server 10.10.10.100 and route all other 7-digit numbers that start with 456 to the third-party PBX?
A. Change dial peer 1 to destination-pattern 456....
B. Change dial peer 2 to session target 10.10.10.100.
C. Remove prefix 456 from dial peer 1.
D. Change dial peer voice 1 pots to dial peer voice 100 pots.
Question #4
HOTSPOT
Question #5
Refer to the topology exhibit.
When the Cisco Unified Communications Manager at the BR1 site loses connectivity to the SAF network, the call to extension 3001 fails to reroute via the PSTN. Examine the SDI trace in the exhibit. What is the most likely cause of the failure?
A. CCD requesting service does not have the correct partition configured for CCD learned patterns
B. The AAR CSS for the HQ phone does not have access to the \\ route pattern.
C. The Cisco Unified Communications Manager at the HQ site was unable to determine the ToDlD number to extension 3001.
D. The calling phone line CSS does not have access to the V route pattern.
E. The full E.164 number for extension 3001 could not be constructed.
Solutions:
| Question #1 Correct Answer: E | Question #2 Correct Answer: B | Question #3 Correct Answer: A | Question #4 Correct Answer: Only visible for members | Question #5 Correct Answer: B |
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