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Cisco 642-321 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: SDH Equipment and Interfaces | 25% | - Multiplexers, regenerators, cross-connects - Optical interfaces and line rates - Electrical to optical conversion |
| Topic 2: SDH Fundamentals and Architecture | 25% | - SDH standardization and hierarchy - Frame structure and overhead bytes - Synchronization and timing principles |
| Topic 3: Maintenance, Troubleshooting & Standards | 25% | - Error rate analysis and diagnostics - Alarm interpretation and fault isolation - ITU-T G.707, G.783, G.806 compliance |
| Topic 4: SDH Configuration and Provisioning | 25% | - Path and trail provisioning - Performance monitoring parameters - Protection switching mechanisms |
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