Expandium

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Expandium, a subsidiary of VIAVI Solutions Inc., is a prominent provider of core network monitoring and assurance solutions based in Saint-Herblain, France. With over 20 years of experience in the telecommunications and internet software sectors, Expandium focuses on delivering innovative solutions that leverage big data for mission-critical assurance. The company specializes in supporting private networks, particularly in sectors that demand high reliability and performance, such as railway telecommunications and mission-critical communications. Expandium's offerings include technologies like the European Rail Traffic Management System (ERTMS), Future Railway Mobile Communication System (FRMCS), and Global System for Mobile Communications – Railway (GSM-R). Their solutions also encompass railway cybersecurity, interlocking, and railway signaling. Since its acquisition by VIAVI Solutions in August 2020, Expandium has enhanced its capabilities in cloud-native and virtualized network assurance solutions, further solidifying its role in the network assurance market.