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Updated: Aug 10, 2026

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Nortel 920-521 Exam Overview:

Certification Vendor:Nortel
Exam Name:Nortel Agile Communication Environment (ACE) Release Design & Engineering
Exam Number:920-521
Certificate Validity Period:Retired / no longer active
Available Languages:English
Exam Format:Multiple choice, Scenario-based questions
Exam Way:Typically delivered via authorized testing centers (historical Nortel certification program)
Pre Condition:Knowledge of enterprise telecommunication systems and IP networking recommended

Nortel 920-521 Exam Syllabus Topics:

SectionObjectives
Design and Engineering Principles- Solution design considerations
  • 1. High availability and redundancy design
    • 2. Capacity planning and scalability
      - Network integration design
      • 1. Service provider interoperability
        • 2. Enterprise network integration
          Operations, Troubleshooting and Maintenance- System monitoring
          • 1. Performance monitoring tools
            • 2. Fault detection and alerting
              - Troubleshooting methodologies
              • 1. Network issue diagnosis
                • 2. Call failure analysis
                  ACE Architecture Overview- Protocol and signaling foundations
                  • 1. VoIP and signaling principles
                    • 2. Interworking with legacy telephony systems
                      - System architecture and components
                      • 1. Service delivery architecture
                        • 2. Core network elements and roles
                          Call Processing and Services- Feature services
                          • 1. Unified communications services
                            • 2. Advanced telephony features
                              - Call routing and control
                              • 1. Routing policies and call flows
                                • 2. Dial plan design and implementation
                                  Quality of Service and Performance- Performance optimization
                                  • 1. Network tuning techniques
                                    • 2. Latency and jitter control
                                      - QoS design
                                      • 1. Traffic prioritization mechanisms
                                        • 2. Bandwidth management strategies

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