Zimocom supplies a retrofit GPRS telemetry package which can be fitted to older trains which are not at present equipped with a real time remote telemetry system. This low cost modular system can be used to monitor critical voltages, services and status of relays, and doors etc.. The system sends the data in real time via GPRS to a server where the data is published to a web browser with real time mimic panel views and historic data stored in a database.