RITES offers communication systems for railways including backbone networks that carry all data for traffic control, telephones, power control, passenger information, public address systems, etc. Vital data for signaling, ATC, ATP and various interlocking purposes which were previously transmitted on propriety lines (copper or fibre), are now often interconnected via specially allocated channels in the transmission system. This increases system reliability and availability in the backbone network.

Backbone Networks Optical Fibres

train2Optical communication systems from RITES offer a number of advantages for the railway environment.  The systems ensure complete immunity to electromagnetic interference, and problems arising from ground loops and electromagnetic radiation are totally avoided. Therefore the use of costly protection circuits is minimized. The transmission network normally consists of an optical fiber cable with PDH/SDH line terminal equipment and primary add/drop multiplexers providing access to the network. A large number of different interface cards are available for all railway applications.rail2

  Microwave Links
microwave Microwave links are an alternative to optical transmission. RITES can provide equipment in all  standard frequency bands, and detailed design of each section is carried out taking land topography, distances between stations, antenna location, and climate into consideration.
  Copper Cables
Sometimes existing copper cables must be used for sections of railway lines where the present infrastructure is to be used for still some time. In this case various types of modems, for instance xDSL types, can be applied in order to increase the amount of data transferred.
Network Management System The Network Management System (NMS) is a supervision and management system dedicated to  operation and maintenance of transmission networks and surrounding equipment. In the event of failure in a geographicallydistributed transmission network, the NMS detects the alarm signals from all communication subsystems along the railway line. Fault identifications are then transmitted to one or more Network Control Centres (NCC) where maintenance staff can take due action.
  Radio Systems
RITES designs dispatch radio systems for railways. Base station infrastructure and corresponding mobiles and portable radios can be provided in all frequencies currently used by the industry. Each controller in the Traffic Control Room has a radio dispatch console for voice communication with the train drivers. Incoming calls are given priorities by the drivers and appear on the screen according to these priorities.

Passenger Information Systems
RITES offers information displays for railway stations different cabinets and different character designs optimized for in-door as well as outdoor use. Displays may consists of 25" colour monitors, Plasma or LCD displays with high intrinsic reliability, LED dot matrix or electromagnetic flap types. Control and distribution of information to the various platforms are computerized and can be integrated with train-graph and train control systems. Public Address Systems for loudspeaker announcements of train arrival and departures, delays, etc. will often be integrated in the passenger information system  where  preprogrammed  messages  are stored on data voice recorders on stations along the railway line. Unmanned stations will have interface between the interlocking system and the Public Address System for automatic platform announcements.
RITES designs telephone systems for railway operators which normally have large and widespread PABX systems. Interconnection of the main exchange with the regional centers takes place via 2 Mbit/s channels in the transmission system. In order to obtain high reliability in case of failure, various ring configurations must be designed when the network is planned. RITES also provides special emergency and service telephone systems where the outdoor telephones are specially designed for rough environments and therefore suitable  for installation along railway lines.