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Cisco 642-321 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| SDH Equipment and Interfaces | 25% | - Multiplexers, regenerators, cross-connects - Electrical to optical conversion - Optical interfaces and line rates |
| Maintenance, Troubleshooting & Standards | 25% | - ITU-T G.707, G.783, G.806 compliance - Error rate analysis and diagnostics - Alarm interpretation and fault isolation |
| SDH Fundamentals and Architecture | 25% | - SDH standardization and hierarchy - Synchronization and timing principles - Frame structure and overhead bytes |
| SDH Configuration and Provisioning | 25% | - Protection switching mechanisms - Path and trail provisioning - Performance monitoring parameters |
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