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Cisco 642-425 Exam Syllabus Topics:

SectionObjectives
Messaging and Collaboration Services- Unity Connection / voicemail issues
  • 1. Call forwarding and voicemail routing
    Voice Gateways and PSTN Integration- Gateway configuration issues
    • 1. Dial peers and call routing
      • 2. ISDN and SIP trunk troubleshooting
        IP Telephony Troubleshooting Methodology- Structured troubleshooting approaches
        • 1. Analyzing call flow problems
          • 2. Isolation techniques for voice issues
            Survivable Remote Site Telephony (SRST)- Failover scenarios
            • 1. SRST activation and behavior
              • 2. Branch site survivability troubleshooting
                IP Phone and Endpoint Issues- IP phone registration and connectivity
                • 1. SCCP and SIP endpoint behavior
                  • 2. DHCP, TFTP, and configuration files
                    Cisco Unified Communications Manager (CUCM) Troubleshooting- Call processing issues
                    • 1. Call routing failures
                      • 2. Device registration problems
                        - Dial plan troubleshooting
                        • 1. Partitions and calling search spaces
                          • 2. Route patterns and translation patterns
                            VoIP Protocol Troubleshooting- Signaling protocols
                            • 1. SCCP call control issues
                              • 2. SIP call flow analysis
                                Quality of Service (QoS)- Voice quality issues
                                • 1. Latency, jitter, and packet loss
                                  • 2. QoS policy verification

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