What are the telecommunications systems that IR uses?
Most of IR’s telecommunications needs are handled by telephone / telegraph cables and other control communication cables running alongside the tracks (often underground in electrified areas) or overhead (usually in non-electrified areas). Important circuits of control and communication include section control for overall control of train running, deputy control and FOIS (Freight Operations Information Systems) for freight movement monitoring, traction power control, remote control, and SCADA sysems for control and switching of the OHE in electrified sections, traction loco control for coordinating locmotive allocations, engineering control for coordinating maintenance and permanent-way work, and S&T control for signalling and related communications. More recently, computerized ticketing/booking and other status information as well as more monitoring and data processing and management systems have come on line and have resulted in new communication systems carrying their data traffic as
