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920-553
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Exam Code: 920-553

Exam Name: Multiservice Switch 15K/20K-OAM in a Carrier VoIP Network

Updated: Jul 23, 2026

Number: 50 Q&As with Testing Engine

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Nortel 920-553 Exam Overview:

Certification Vendor:Nortel
Exam Name:Multiservice Switch 15K/20K-OAM in a Carrier VoIP Network
Exam Number:920-553
Exam Format:Multiple Choice
Passing Score:70%
Real Exam Qty:50–62
Exam Duration:90–120
Exam Price:USD 125–200
Available Languages:English
Certificate Validity Period:2–3 years
Recommended Training:Nortel Official Training Materials (archived)
Exam Registration:Pearson VUE (historical provider)
Sample Questions:Nortel 920-553 Sample Questions
Exam Way:Computer-based testing (onsite at authorized test centers)
Pre Condition:No formal prerequisites; recommended experience with Nortel Multiservice Switch and VoIP technologies
Official Syllabus URL:Not available (Nortel defunct, no active official page)

Nortel 920-553 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Fault Management & Troubleshooting25%- Diagnostic tools and commands
- Alarm and event handling
- Troubleshooting VoIP and service issues
Topic 2: OAM Fundamentals in Carrier VoIP Networks20%- Multiservice Switch 15K/20K platform basics
- Carrier VoIP network architecture overview
- OAM concepts and standards
Topic 3: Performance Monitoring & Statistics20%- Report generation and analysis
- QoS and traffic monitoring
- Performance metrics collection
Topic 4: Configuration of OAM Functions25%- OAM provisioning and setup
- Fault management configuration
- Connectivity verification protocols
Topic 5: Maintenance & Operational Procedures10%- Software upgrades and backups
- Service continuity and redundancy
- Best practices for OAM operations

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