The modular system design of LEOS covers the full range, from the simple non-networked stand-alone system up to a complex LEOS network built of almost any number of subsystems, providing data through Ethernet to a central LEOS server which archives them all in a database and makes them available by means of a web interface for access with standard web browsers.

The decentralization of the monitoring task allows to use standard networks without real-time capabilities. All data relevant for the server are being buffered in the Measuring Stations for sufficient time.

Schließlich Finally, there is also the option of remote access for the LEOS experts at AREVA NP, in order to support the operating personnel on demand, perform software updates or do the regular supplier's functional system checks that might be required by some regulations. As an alternative to the direct computer access via VPN (VPN = Virtual Private Network) as shown in the figure below, there is also the option of "KVM over IP" (KVM = Keyboard-Video-Mouse), where only the KVM signals are transmitted between e.g. the AREVA computer and the LEOS client computer either over VPN internet or ISDN modem link. In this case, the AREVA computer is not directly connected to the LEOS operator's plant network.