Applying an observability strategy in telecommunications using the Elastic Stack enhances the capability to analyze and monitor voice traffic data, offering insights previously unattainable. The Elastic Stack, notably adopted by companies like Deutsche Telekom, provides a comprehensive platform comprising Elasticsearch for data storage and analysis, Beats and Logstash for data ingestion, and Kibana for visualization. This integration allows operators to consolidate traditionally siloed data, enabling a holistic view that correlates customer experience with service quality and system availability. Key performance indicators such as Call Data Records (CDRs), Call Setup Success Ratio (CSSR), and Average Call Duration (ACD) can be efficiently monitored, and machine learning capabilities facilitate anomaly detection in network behaviors. These advancements help operators detect fraud, improve network efficiency, and react swiftly to potential issues, thereby reducing the risk of revenue loss and enhancing customer satisfaction.