The Telefónica iFUSION project is using SDN to transform and optimize its multi-vendor transport network to support the rollout of 5G and digital services. With the iFUSION program well underway, Telefónica is now investigating how it will transform its OSS to increase the automation of its transport networks, leveraging the programmability of SDN. This Omdia case study describes several OSS use cases regarding service discovery, design and activation that were recently implemented as a proof of concept (POC) within Telefónica’s German network.