Cisco 642-427 Exam Details & Actual Exam Questions
- Exam Code/Number: 642-427
- Exam Name/Title: Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0)
- Certification Provider: Cisco
- Corresponding Certification: CCNP Voice
- Exam Questions: 301
- Updated On: Aug,06 2026
- Certification Level: Professional
Cisco Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) Exam Questions
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(30 Up Votes)Cisco 642-427 Exam Overview:
| Certification Vendor: | Cisco |
| Exam Name: | Troubleshooting Cisco Unified Communications v8.0 (TVOICE v8.0) |
| Exam Number: | 642-427 |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90-120 |
| Exam Price: | USD 250-300 |
| Exam Format: | Multiple Choice, Drag-and-Drop, Simulation |
| Real Exam Qty: | 30-70 |
| Available Languages: | English, Japanese |
| Related Certifications: | CCNP Collaboration (Legacy) Cisco Certified Specialist |
| Passing Score: | 825 / 1000 |
| Recommended Training: | Official Cisco Training: Troubleshooting Cisco Unified Communications v8.0 (TVOICE) |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Cisco 642-427 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% | - Monitoring and diagnostic tools: RTMT, Serviceability, traces, logs, debugs - Systematic troubleshooting approach |
| Advanced Features and Applications | 20% | - Media resources, voice quality, and QoS issues - Extension Mobility Cross Cluster - Call Control Discovery (CCD) and SAF |
| CUCM and Registration Troubleshooting | 25% | - Gateway and trunk registration (SIP, H.323, MGCP) - CUCM service availability and database replication - Endpoint and IP phone registration issues |
| Integrated Solution Troubleshooting | 10% | - Unity Connection integration issues - Presence and IM service troubleshooting |
| Call Setup and Dial Plan Troubleshooting | 25% | - Dial plan, route patterns, partitions, CSS, translation rules - Intrasite, intersite, and off-net call failures - Globalized call routing and number transformation |
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