This eBook explains that legacy, monolithic OSS cannot keep up with 5G, private networks, edge, IoT, and AI-era demands because they are hard to automate, integrate, and scale. It proposes composable OSS built from modular, API-driven components such as GIS, network resource management, and service assurance that can be deployed independently, often in the cloud, to speed rollouts and reduce cost. Real-world use cases show how composable OSS improves fiber planning, inventory accuracy, and proactive assurance, while a field guide and vendor checklist help operators plan migration and avoid new lock-in.

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