Great Potential, page-129

CORONA uses patent-pending real-time geo-location and dynamic PBX management technologies to optimise automatically your organisation’s global voice routing plan. This ensures that as much as possible of your organisation’s roaming voice traffic is routed over your internal private voice cloud, as well as lower-cost high-quality fixed telephony routes, rather than the external cellular network – saving you money and improving security and contactability.

I remember seeing around 5 patents pending related to this tech.

Will go back and investigate!