ZH-Zurich, Switzerland, Nexus Telecom AG, a privately-held company with headquarters in Zurich, Switzerland and regional offices spread all over the world, specializes in developing network & service in- vestigation tools and revenue assur- ance solutions. With these sophisti- cated and state-of-the-art software products, Nexus Telecom enables telecom service providers/operators to assure and improve the quality of their