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Updated: Sep 11, 2026
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Cisco 642-425 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | IP Telephony Troubleshooting |
| Exam Number: | 642-425 |
| Exam Format: | Multiple Choice |
| Real Exam Qty: | 50-60 |
| Related Certifications: | Cisco CCVP |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Sample Questions: | Cisco 642-425 Sample Questions |
| Exam Way: | Onsite at Pearson VUE / Authorized Cisco Testing Centers |
| Pre Condition: | Valid Cisco CCNA or equivalent experience |
| Official Syllabus URL: | https://www.cisco.com/go/certifications |
Cisco 642-425 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Network Infrastructure Troubleshooting | - Voice Quality and QoS Related Problems - IP Network Common Issues |
| Topic 2: Cisco Unity and CTI Troubleshooting | - CTI Manager and JTAPI Issues - Cisco Unity Configuration & Operation Errors |
| Topic 3: Cisco CallManager Troubleshooting | - Signaling Architecture Issues (H.323, SIP, MGCP) - Dial Plan and Call Routing Problems |
| Topic 4: Troubleshooting Methodology | - Gathering Facts and Defining Problems - Systematic Troubleshooting Approaches |
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