Digital Twins in Telecom: From Virtual Models to Trusted Networks The digital twin has become one of the most compelling ideas in telecoms. The principle, formalised in ITU-T Y.3090, is straightforward: build a virtual representation of the physical network that you can analyse, diagnose, emulate and control, with a real-time mapping kept in step between the two. Run a "what-if" against the twin instead of the live network. Let an AI loop rehearse an optimisation in the model