All but the largest telecom operators should be looking at deploying the STIR/SHAKEN standard for blocking unwanted calls as a service, managed by a vendor partner, rather than building out their own infrastructure.
Orange Polska has released Mixeway, an open source CI/CD security orchestration tool. It needs a lot more work but the GUI and aspiration to correlate vulnerability testing across security tools make it worth taking a look at.
SKT is a world-leader in 5G. This HardenStance Briefing depicts the operator’s strategy for 5G services and applications and the contribution A10 Networks is making to SKT’s supporting network and network security infrastructure.