The TC Mobile I/O X300 mobile radio module from Phoenix Contact monitors analog and digital signals from remote outstations via the mobile radio network. Relays can also be switched remotely and their switching times can also be individually determined using the integrated calendar. When monitoring systems with outstations, the mobile radio module communicates continuously with an ODP server as an ODP telecontrol station via the GRPS mobile radio service. Online values as well as historical data and alarms - including time stamps - can be transmitted to a control center via the Internet. The measured values are evaluated and saved there.