Cisco IP Telephony Troubleshooting - testinsides 642-425 dumps

642-425 real exams

Exam Code: 642-425

Exam Name: IP Telephony Troubleshooting

Updated: Aug 27, 2026

Q & A: 54 Questions and Answers

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Cisco 642-425 Exam Syllabus Topics:

SectionWeightObjectives
Troubleshooting Methodology15%- Systematic troubleshooting approach
- Using Cisco diagnostic tools
Gateway & DSP Troubleshooting20%- DSP resource allocation
- Signaling protocol errors
- Analog and digital gateway issues
IP Phone & Endpoint Troubleshooting15%- Phone registration and TFTP issues
- Firmware and configuration download
- VLAN and network connectivity
Signaling & Media Path Troubleshooting20%- RTP stream and voice quality problems
- Codec negotiation failures
- H.323, SIP, MGCP protocol issues
CallManager & Unified CM Troubleshooting30%- Call processing problems
- Service activation and failures
- Database replication issues

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