Explore the evolutionary journey of Radio Access Network (RAN) architecture in this 13-minute video, starting from traditional legacy systems through to modern open, disaggregated networks. Trace the development from early monolithic, proprietary systems and their limitations on interoperability, innovation, and vendor choice. Learn about key milestones including the transition to Centralized RAN (C-RAN) with its centralized baseband processing capabilities, and Virtualized RAN (V-RAN) which introduced enhanced flexibility and scalability through virtualization technologies. Discover how the emergence of Open RAN (O-RAN) represents a transformative shift in telecommunications, introducing open interfaces, interoperability, and vendor neutrality to enable operators to build more agile and cost-effective networks suited for today's dynamic digital landscape.