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Nortel 920-255 Exam Syllabus Topics:

SectionObjectives
Topic 1: System Configuration and Deployment- Integration with enterprise systems
  • 1. PSTN integration
    • 2. SIP trunk configuration
      - Installation and setup
      • 1. Voice system deployment procedures
        • 2. Initial configuration steps
          Topic 2: Network Infrastructure for Voice- IP network requirements
          • 1. LAN/WAN considerations
            • 2. Bandwidth planning for voice services
              - QoS for voice traffic
              • 1. Traffic prioritization techniques
                • 2. Latency, jitter, and packet loss control
                  Topic 3: Enterprise Voice Architecture- Nortel voice solutions architecture
                  • 1. Call routing and switching design
                    • 2. Media gateway integration
                      - VoIP fundamentals
                      • 1. IP telephony concepts
                        • 2. Signaling protocols (SIP, H.323)
                          Topic 4: Operations, Maintenance, and Troubleshooting- Fault diagnosis
                          • 1. Performance troubleshooting procedures
                            • 2. Common call failure scenarios
                              - System monitoring
                              • 1. Voice quality monitoring tools
                                • 2. Alarm and event management
                                  Topic 5: Call Control and Unified Communications- Unified communications services
                                  • 1. Voicemail and messaging integration
                                    • 2. Presence and collaboration services
                                      - Call processing
                                      • 1. Call admission control
                                        • 2. Dial plan configuration

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