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Updated: Aug 27, 2026

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Cisco 642-104 Exam Overview:

Certification Vendor:Cisco
Exam Name:Cisco Unified Communications for System Engineers (UCSE) Exam
Exam Number:642-104
Passing Score:Cisco scaled scoring (typically 750–850/1000, varies by exam version)
Exam Format:Multiple answer, Scenario-based questions, Multiple choice
Related Certifications:Cisco Unified Communications Specialist
CCNP Collaboration (legacy track)
Real Exam Qty:45-65 (typical range)
Certificate Validity Period:3 years (Cisco certification validity policy)
Exam Price:USD 250-300 (varies by region and time)
Exam Duration:90-120
Available Languages:English
Recommended Training:Cisco Official Training Catalog
Cisco Unified Communications Training (Cisco Learning Network)
Exam Registration:Pearson VUE Cisco Exams
Cisco Certification Registration
Sample Questions:Cisco 642-104 Sample Questions
Exam Way:Computer-based exam delivered via Pearson VUE testing centers or online proctoring (where available)
Pre Condition:Recommended: CCNA Voice or equivalent networking and VoIP knowledge
Official Syllabus URL:https://www.cisco.com/c/en/us/training-events/training-certifications.html

Cisco 642-104 Exam Syllabus Topics:

SectionObjectives
Troubleshooting and Maintenance- UC system troubleshooting
  • 1. Call failure analysis
    • 2. Device registration and signaling issues
      Messaging and Collaboration Services- Voicemail and unified messaging
      • 1. Cisco Unity Connection integration
        • 2. Call forwarding and voicemail routing
          Cisco Unified Communications Architecture- UC architecture components and design principles
          • 1. Unified Communications Manager (CUCM) overview
            • 2. IP telephony architecture models
              Cisco Unified Communications Manager (CUCM)- CUCM configuration and administration
              • 1. Device configuration (phones, gateways, trunks)
                • 2. User and endpoint management
                  Call Control and Dial Plan- Dial plan design and implementation
                  • 1. Numbering plans and call routing logic
                    • 2. Route patterns and translation patterns
                      Voice Gateway and PSTN Integration- Gateway configuration and protocols
                      • 1. PSTN connectivity and call routing
                        • 2. SIP, H.323, MGCP concepts
                          Quality of Service (QoS) for Voice- QoS mechanisms and design
                          • 1. Latency, jitter, and packet loss handling
                            • 2. Traffic classification and prioritization

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