- Exam Code: 920-552
- Exam Name: GSM BSS Operations and Maintenance
- Updated: Aug 10, 2026
- Q & A: 122 Questions and Answers
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| Section | Weight | Objectives |
|---|---|---|
| Maintenance & Troubleshooting | 20% | - Call drop and handover issues - Hardware and software maintenance - Alarm handling and fault isolation |
| Security & System Management | 10% | - Access control and security - Backup and restore procedures |
| BSS Operation & Configuration | 25% | - BTS configuration and commissioning - Frequency planning and management - BSC administration and parameters |
| Performance Monitoring & Optimization | 25% | - Traffic analysis and load balancing - Radio resource management - Key performance indicators (KPIs) |
| GSM BSS System Overview | 20% | - Interface protocols (A-bis, A, Um) - GSM network architecture - BSS components: BSC, BTS, TRX |
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